Chalkedon (also Chalcedon, Kalchedon, Calcedon,) was an ancient maritime town of Bithynia founded by Greek colonists from Megara in the second half of the seventh century BC.
See:
- Belke Gates to Asia Minor: The Harbours of Chalcedon, Chrysopolis, Hiereia and Eutroiu Limen Opposite Constantinople, in: F. Daim, E. Kislinger (eds.), The Byzantine Harbours of Constantinople, Mainz 2021, pp. 223-233. Klaus Belke. https://www.academia.edu/82735378/Belke_Gates_to_Asia_Minor_The_Harbours_of_Chalcedon_Chrysopolis_Hiereia_and_Eutroiu_Limen_Opposite_Constantinople_in_F_Daim_E_Kislinger_eds_The_Byzantine_Harbours_of_Constantinople_Mainz_2021_pp_223_233_improved_English_translation_of_Tore_nach_Kleinasien_
- https://www.cnnturk.com/turkiye/haydarpasa-garindaki-arkeolojik-kazilar-kadikoyun-arkeolojisi-ve-tarihi-yeniden-gun-isigina-cikti?page=3
- https://www.sabah.com.tr/galeri/turkiye/istanbulun-tarihine-yeni-bir-isik-tutacak-haydarpasa-garindaki-kazilarda-yeni-kesif/9