Akcakoca Genoese Castle Akçakoca Fortress or Genoese Castle is located near Akçakoca city in the boundaries of Düzce province. Built high up on a cliff, it was constructed from stone and brick with semicircular eaves on its west side. There's also a bastion on its south wall and cisterns within the courtyard. Genoeses recorded ownership of fortress walls in İstanbul and Amasra by placing their coat-of-arms. Chemical analyses on brick and plaster used for later Akçakoca Fortress show that the site was likely in use during Genoese occupation," which suggests it was likely built by them as well. Akcakoca Fortress has been added to the Tentative List of UNESCO in 2020 with the title of Trading Posts and Fortifications on Genoese Trade Routes from the Mediterranean to the Black Sea.