Ten real historic padlocks shown with verified Wikimedia Commons and museum collection photographs. Photograph credits: 1. File:Padlock And Key (Germany), 17th century (CH 18390989).jpg; Unknown artist Unknown artist; Public domain; ; https://commons.wikimedia.org/wiki/File:Padlock_And_Key_%28Germany%29%2C_17th_century_%28CH_18390989%29.jpg; 2. File:Padlock and key from Serbian medieval town Novo Brdo, National Museum of Serbia.jpg; Gmihail at Serbian Wikipedia; CC BY-SA 3.0 rs; https://creativecommons.org/licenses/by-sa/3.0/rs/deed.en; https://commons.wikimedia.org/wiki/File:Padlock_and_key_from_Serbian_medieval_town_Novo_Brdo%2C_National_Museum_of_Serbia.jpg; 3. File:Padlock and key - 17c - Ryazan Kremlin Museum.jpg; Лапоть; CC0; http://creativecommons.org/publicdomain/zero/1.0/deed.en; https://commons.wikimedia.org/wiki/File:Padlock_and_key_-_17c_-_Ryazan_Kremlin_Museum.jpg; 4. File:Padlock MET 164171.jpg; This file was donated to Wikimedia Commons as part of a project by the Metropolitan Museum of Art . See the Image and Data Resources Open Access Policy; CC0; http://creativecommons.org/publicdomain/zero/1.0/deed.en; https://commons.wikimedia.org/wiki/File:Padlock_MET_164171.jpg; 5. File:Padlock MET sf10-100-183s1.jpg; This file was donated to Wikimedia Commons as part of a project by the Metropolitan Museum of Art . See the Image and Data Resources Open Access Policy; CC0; http://creativecommons.org/publicdomain/zero/1.0/deed.en; https://commons.wikimedia.org/wiki/File:Padlock_MET_sf10-100-183s1.jpg; 6. File:Medieval copper alloy padlock (FindID 865218).jpg; Somerset County Council, Wil Partridge, 2017-09-28 15:36:24; CC BY 2.0; https://creativecommons.org/licenses/by/2.0; https://commons.wikimedia.org/wiki/File:Medieval_copper_alloy_padlock_%28FindID_865218%29.jpg; 7. File:Medieval padlock (FindID 771126).jpg; The Portable Antiquities Scheme, Cristina Sanna, 2016-03-03 11:38:25; CC BY 2.0; https://creativecommons.org/licenses/by/2.0; https://commons.wikimedia.org/wiki/File:Medieval_padlock_%28FindID_771126%29.jpg; 8. Met object 468867; The Metropolitan Museum of Art; Public Domain / Open Access; https://www.metmuseum.org/about-the-met/policies-and-documents/open-access; https://www.metmuseum.org/art/collection/search/468867; 9. Met object 202001; The Metropolitan Museum of Art; Public Domain / Open Access; https://www.metmuseum.org/about-the-met/policies-and-documents/open-access; https://www.metmuseum.org/art/collection/search/202001; 10. Padlock, 18th century, Met object 446005; The Metropolitan Museum of Art; Public Domain / Open Access; https://www.metmuseum.org/about-the-met/policies-and-documents/open-access; https://www.metmuseum.org/art/collection/search/446005;