{"event":"ecommerce_event","event_name":"view_item","event_category":"browse_catalog","ecommerce":{"items":[{"item_id":"UIG5311410","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_engraving_depicting_a_method_of_using_a_camera_obscura_as_a_drawing_aid_19th_century","item_variant":"undefined"},{"item_id":"LLM6014391","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_litho","item_variant":"undefined"},{"item_id":"CH466673","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"arcimboldo_giuseppe_1527_93","item_category5":"not_balown","item_list_name":"search_results","item_name":"reversible_anthropomorphic_portrait_of_a_man_composed_of_fruit_oil_on_panel","item_variant":"undefined"},{"item_id":"MAY382095","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"stella_frank_b_1936","item_category5":"not_balown","item_list_name":"search_results","item_name":"gray_scramble_single_1969_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"EDB51721","item_category":"illustration","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"thaumatrope","item_variant":"undefined"},{"item_id":"AII135323","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"niceron_jean_francois_1613_46","item_category5":"not_balown","item_list_name":"search_results","item_name":"anamorphosis_oil_on_canvas","item_variant":"undefined"},{"item_id":"AII135306","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"niceron_jean_francois_1613_46","item_category5":"not_balown","item_list_name":"search_results","item_name":"anamorphosis_oil_on_panel","item_variant":"undefined"},{"item_id":"AII135305","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"niceron_jean_francois_1613_46","item_category5":"not_balown","item_list_name":"search_results","item_name":"anamorphosis_oil_on_panel","item_variant":"undefined"},{"item_id":"LLM3627865","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"another_optical_illusion_engraving","item_variant":"undefined"},{"item_id":"CHT191427","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"japanese_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"cats_forming_a_cat_s_head_c_1810_colour_woodblock_print","item_variant":"undefined"},{"item_id":"CEC128157","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"close_chuck_b_1940","item_category5":"not_balown","item_list_name":"search_results","item_name":"alex_1991","item_variant":"undefined"},{"item_id":"UIG2623846","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"zoetrope_optical_illusion_disc","item_variant":"undefined"},{"item_id":"GIA4696628","item_category":"illustration","item_category2":"undetermined_copyright","item_category3":"standard","item_category4":"unknown_artist","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_print","item_variant":"undefined"},{"item_id":"EPL6862669","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_ghost","item_variant":"undefined"},{"item_id":"UIG2911864","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_disc","item_variant":"undefined"},{"item_id":"NNY232279","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"barron_jenny","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_2005_w_c_on_paper","item_variant":"undefined"},{"item_id":"LRI4819893","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"roman_1st_century_bc","item_category5":"not_balown","item_list_name":"search_results","item_name":"trompe_l_oeil_garden_from_the_villa_of_livia_40_20_bc_fresco","item_variant":"undefined"},{"item_id":"UIG5309088","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"example_of_an_optical_illusion_composite_picture_of_an_old_woman_and_a_girl","item_variant":"undefined"},{"item_id":"PWI95100","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vieira_da_silva_maria_elena_1908_92","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_great_blue_room_1951_oil_on_canvas","item_variant":"undefined"},{"item_id":"PVD1682460","item_category":"photo","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"white_cross_ruling_on_a_black_background_optical_illusion_kinetic_art","item_variant":"undefined"},{"item_id":"GIA4696629","item_category":"illustration","item_category2":"undetermined_copyright","item_category3":"standard","item_category4":"unknown_artist","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_print","item_variant":"undefined"},{"item_id":"LLR5236356","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"american_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_optical_illusion_litho","item_variant":"undefined"},{"item_id":"EPL6862663","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_ghost","item_variant":"undefined"},{"item_id":"AII80432","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_study_of_federigo_da_montefeltro_duke_of_urbino_intarsia_panelling_depicting_a_display_of_sectio","item_variant":"undefined"},{"item_id":"KCP395961","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"campbell_pedersen_kathrine","item_category5":"not_balown","item_list_name":"search_results","item_name":"communication_gaps_coping_2009_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"KCP389499","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"campbell_pedersen_kathrine","item_category5":"not_balown","item_list_name":"search_results","item_name":"communication_gaps_2009_acrylics_on_canvas","item_variant":"undefined"},{"item_id":"CMT356806","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"carpet_design_w_c_on_paper","item_variant":"undefined"},{"item_id":"PRG332679","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"parrag_emil_1925_2019","item_category5":"not_balown","item_list_name":"search_results","item_name":"lake_reflecting_moonlight_1989_oil_on_wood","item_variant":"undefined"},{"item_id":"LRI4819896","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"roman_1st_century_bc","item_category5":"not_balown","item_list_name":"search_results","item_name":"trompe_l_oeil_garden_from_the_villa_of_livia_40_20_bc_fresco","item_variant":"undefined"},{"item_id":"INC2971258","item_category":"photo","item_category2":"in_copyright","item_category3":"standard","item_category4":"kepes_gyorgy_1906_2001","item_category5":"not_balown","item_list_name":"search_results","item_name":"untitled_1937_43_gelatin_silver_photogram","item_variant":"undefined"},{"item_id":"PFH1183832","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"german_school","item_category5":"not_balown","item_list_name":"search_results","item_name":"duck_rabbit_optical_illusion_illustration_from_fliegende_blatter_1892_print","item_variant":"undefined"},{"item_id":"LLM3628872","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"european_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_spectre_an_optical_illusion_engraving","item_variant":"undefined"},{"item_id":"UIG3524506","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_of_a_ghostly_figure","item_variant":"undefined"},{"item_id":"UIG5311353","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_engraving_depicting_a_method_of_using_a_camera_obscura_as_a_drawing_aid_19th_century","item_variant":"undefined"},{"item_id":"UIG5309089","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"example_of_an_optical_illusion_two_happy_children_framed_by_an_arch_play_at_a_table_with_their_pet_d","item_variant":"undefined"},{"item_id":"AII80422","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_study_of_federigo_da_montefeltro_duke_of_urbino_intarsia_panelling_depicting_open_cupboards_and_","item_variant":"undefined"},{"item_id":"PSZ80498","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"szumowski_peter","item_category5":"not_balown","item_list_name":"search_results","item_name":"abstract_composition_1996","item_variant":"undefined"},{"item_id":"UIG5310282","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"a_twin_magic_lantern_engraving","item_variant":"undefined"},{"item_id":"NGV478926","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"not_balown","item_list_name":"search_results","item_name":"untitled_c_1970s_colour_screenprint","item_variant":"undefined"},{"item_id":"DMW753273","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"not_balown","item_list_name":"search_results","item_name":"vega_wa_3_1968_tempera_on_board","item_variant":"undefined"},{"item_id":"NUM130978","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"not_balown","item_list_name":"search_results","item_name":"untitled_screenprint","item_variant":"undefined"},{"item_id":"FGL6203004","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"history_of_photograph_and_cinema_the_toy_called_thaumatropio","item_variant":"undefined"},{"item_id":"KCP395965","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"campbell_pedersen_kathrine","item_category5":"not_balown","item_list_name":"search_results","item_name":"merging_markets_2009_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"TEP409786","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"walters_gordon_1919_95","item_category5":"not_balown","item_list_name":"search_results","item_name":"makaro_1969_pva_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"FGL6203003","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"history_of_photograph_and_cinema_the_toy_called_thaumatropio","item_variant":"undefined"},{"item_id":"TEP409793","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"thorburn_ray_b_1937","item_category5":"not_balown","item_list_name":"search_results","item_name":"modular_13_series_2_1970_acrylic_on_hardboard","item_variant":"undefined"},{"item_id":"DTR497796","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"anuszkiewicz_richard_joseph_b_1930","item_category5":"not_balown","item_list_name":"search_results","item_name":"convexity_1966_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"NGV478922","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_composition_1969_screenprint","item_variant":"undefined"},{"item_id":"CMT356809","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"carpet_design_w_c_on_paper","item_variant":"undefined"},{"item_id":"QMG1081470","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"english_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"kaleidoscope_quilt_1890_1900_silk","item_variant":"undefined"},{"item_id":"BAL226670","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"leemans_johannes_c_1633_88","item_category5":"not_balown","item_list_name":"search_results","item_name":"hunting_equipment_oil_on_canvas","item_variant":"undefined"},{"item_id":"ONT996294","item_category":"photo","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"american_photographer_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"g_a_reid_and_chas_wagner_philadelphia_in_perspective_c_1883_cyanotype","item_variant":"undefined"},{"item_id":"XIR178987","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"balown","item_list_name":"search_results","item_name":"vega_pal_1969_oil_on_canvas","item_variant":"undefined"},{"item_id":"XBP231812","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"american_school_19th_century","item_category5":"balown","item_list_name":"search_results","item_name":"optical_flower_puzzle_quilt_1854_silk","item_variant":"undefined"},{"item_id":"PNH353093","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"gibb_phelan_1870_1948","item_category5":"not_balown","item_list_name":"search_results","item_name":"assemblage_and_tromp_l_oeil_1930_collage_gouache_and_painted_metal_on_wood","item_variant":"undefined"},{"item_id":"LLM5206012","item_category":"illustration","item_category2":"undetermined_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_cloisters_colour_litho","item_variant":"undefined"},{"item_id":"EPL6810445","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"romantic_view_in_wales_optical_illusion","item_variant":"undefined"},{"item_id":"NUM118949","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"yvaral_vasarely_jean_pierre_1934_2002","item_category5":"not_balown","item_list_name":"search_results","item_name":"quadri_structure_no_91_1970","item_variant":"undefined"},{"item_id":"LLM5206009","item_category":"illustration","item_category2":"undetermined_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_spiral_colour_litho","item_variant":"undefined"},{"item_id":"AII80431","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"pontelli_baccio_c_1450_92","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_study_of_federigo_da_montefeltro_duke_of_urbino_intarsia_panelling_depicting_l_an_open_cupboard_","item_variant":"undefined"},{"item_id":"AII80427","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_study_of_federigo_da_montefeltro_duke_of_urbino_intarsia_panelling_depicting_a_cupboard_with_lat","item_variant":"undefined"},{"item_id":"UIG5310949","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_engraving_depicting_isaac_newton_s_experiment_showing_how_a_prism_refracted_a_beam_of_light_and_b","item_variant":"undefined"},{"item_id":"BL3300217","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"mrs_daffodil_downey_s_seance_presented_by_maskelyne_cooke_at_the_egyptian_hall_c_1885","item_variant":"undefined"},{"item_id":"LLM5206024","item_category":"illustration","item_category2":"undetermined_copyright","item_category3":"standard","item_category4":"english_school_20th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"optical_illusion_cheese_colour_litho","item_variant":"undefined"},{"item_id":"AII135301","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"niceron_jean_francois_1613_46","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_anamorphosis_oil_on_canvas","item_variant":"undefined"},{"item_id":"HKL274896","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"merian_matthaus_the_elder_1593_1650_after","item_category5":"not_balown","item_list_name":"search_results","item_name":"death_dance_published_in_basel_in_1744_engraving","item_variant":"undefined"},{"item_id":"UCL274671","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"benyon_margaret_b_1940","item_category5":"not_balown","item_list_name":"search_results","item_name":"coil_1964_house_paint_acrylic_on_hardboard","item_variant":"undefined"},{"item_id":"IMJ256746","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"fangor_wojciech_1922_2015","item_category5":"not_balown","item_list_name":"search_results","item_name":"m_22_1968_1968_oil_on_canvas","item_variant":"undefined"},{"item_id":"CHT200413","item_category":"photo","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"french_school_19th_century","item_category5":"not_balown","item_list_name":"search_results","item_name":"phantasmagoria_from_memoires_recreatifs_scientifiques_et_anecdotiques_by_etienne_gaspard_robertson_1","item_variant":"undefined"},{"item_id":"CVL499907","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"anuszkiewicz_richard_joseph_b_1930","item_category5":"not_balown","item_list_name":"search_results","item_name":"prisma_1968_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"NUM130979","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"not_balown","item_list_name":"search_results","item_name":"untitled_screenprint","item_variant":"undefined"},{"item_id":"UIG5311314","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_artist_using_perspective_17th_century","item_variant":"undefined"},{"item_id":"BSC157514","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"schonzeit_ben","item_category5":"not_balown","item_list_name":"search_results","item_name":"striped_chintz_rose_1998_acrylic_on_linen","item_variant":"undefined"},{"item_id":"XIR182141","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"agam_yaacov_b_1928","item_category5":"balown","item_list_name":"search_results","item_name":"marine_background_1963_mixed_media","item_variant":"undefined"},{"item_id":"UIG5310241","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"charles_emile_reynaud_s_praxinoscope","item_variant":"undefined"},{"item_id":"AII80423","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_study_of_federigo_da_montefeltro_duke_of_urbino_intarsia_panelling_depicting_a_bird_cage_and_a_c","item_variant":"undefined"},{"item_id":"CH1127474","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category4":"arcimboldo_giuseppe_1527_93","item_category5":"not_balown","item_list_name":"search_results","item_name":"reversible_anthropomorphic_portrait_of_a_man_composed_of_fruit_oil_on_panel_detail_of_466673","item_variant":"undefined"},{"item_id":"KCP395962","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"campbell_pedersen_kathrine","item_category5":"not_balown","item_list_name":"search_results","item_name":"communication_gaps_calm_2009_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"XIR182140","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"agam_yaacov_b_1928","item_category5":"balown","item_list_name":"search_results","item_name":"marine_background_1963_mixed_media","item_variant":"undefined"},{"item_id":"TAV273412","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"not_balown","item_list_name":"search_results","item_name":"torony_mc_1970_oil_on_canvas","item_variant":"undefined"},{"item_id":"AII80425","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_study_of_federigo_da_montefeltro_duke_of_urbino_intarsia_panelling_depicting_the_figure_of_chari","item_variant":"undefined"},{"item_id":"KCP395964","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"campbell_pedersen_kathrine","item_category5":"not_balown","item_list_name":"search_results","item_name":"night_and_day_star_2009_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"FLV449678","item_category":"photo","item_category2":"no_copyright","item_category3":"standard","item_category4":"felver_chris","item_category5":"not_balown","item_list_name":"search_results","item_name":"untitled_b_w_photo","item_variant":"undefined"},{"item_id":"PSZ54902","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"szumowski_peter","item_category5":"not_balown","item_list_name":"search_results","item_name":"recession","item_variant":"undefined"},{"item_id":"NUM117535","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"yvaral_vasarely_jean_pierre_1934_2002","item_category5":"not_balown","item_list_name":"search_results","item_name":"ambiguous_structure_no_51_1969_oil_on_canvas","item_variant":"undefined"},{"item_id":"NUM130981","item_category":"illustration","item_category2":"in_copyright","item_category3":"standard","item_category4":"vasarely_victor_1906_97","item_category5":"not_balown","item_list_name":"search_results","item_name":"untitled_screenprint","item_variant":"undefined"},{"item_id":"UIG5311290","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"an_engraving_depicting_the_refraction_of_a_beam_of_light_in_a_bowl_of_water_the_beam_of_light_is_ben","item_variant":"undefined"},{"item_id":"KCP3823028","item_category":"illustration","item_category2":"in_copyright","item_category3":"premium","item_category4":"campbell_pedersen_kathrine","item_category5":"not_balown","item_list_name":"search_results","item_name":"transition_ii_2011_acrylic_on_canvas","item_variant":"undefined"},{"item_id":"UIG5311316","item_category":"illustration","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_vanishing_point_in_perspective_17th_century","item_variant":"undefined"},{"item_id":"AII80426","item_category":"object","item_category2":"out_of_copyright","item_category3":"standard","item_category5":"not_balown","item_list_name":"search_results","item_name":"the_study_of_federigo_da_montefeltro_duke_of_urbino_intarsia_panelling_depicting_a_reading_stand_in_","item_variant":"undefined"}]}}

{"event":"custom_event","event_name":"view_search_result","event_category":"browse_catalog","keyword":"optical illusion","search_type":"standard","search_bridgeman_artists":"false","search_mode":"automatic","search_zero_result":"false","search_results":771,"search_results_page_number":1}