Tsohon Birni osiedle (Yaren mutanen Poland: Osiedle Stare Miasto) ita ce gundumomi mafi tsufa a cikin birnin Zamość. Yana ɗaya daga cikin Rukunan Tarihi na Duniya a Poland (an ƙara a cikin 1992). A cewar UNESCO, wannan kimar abin tunawa ta ta'allaka ne a cikinsa kasancewarsa "fitaccen misali ne na garin da aka tsara na Renaissance a ƙarshen karni na 16, wanda ke riƙe da tsarinsa na asali da kagara da yawancin gine-gine na musamman, yana haɗa al'adun gine-ginen Italiya da tsakiyar Turai." Garin na Medieval yana da yanki mai girman hekta 75 da yankin buffer na ha 200. An nada gundumar ɗaya daga cikin abubuwan tunawa da tarihi na ƙasar Poland (Pomnik historii), kamar yadda aka keɓe ranar 16 ga Satumba, 1994. Hukumar Tarihi ta ƙasar Poland ce ke kula da lissafinta. An gina Zamość a ƙarshen karni na 16 bisa ga ka'idodin Italiyanci na "gari mai kyau." Jan Zamoyski ne ya dauki nauyin gina wannan sabon gari, kuma mai ginin gine-gine Bernardo Morando ne ya yi shi.