The Zindan Baba Tomb in Lüleburgaz (Kocasinan neighbourhood) is an Ottoman, Bursa-type single-domed structure standing where the dungeon of Lüleburgaz Castle once was. Its oldest record is the Edirne Yearbook of H.1310. The identity of the buried figure is uncertain, contested between folk narrative and historical record; one view proposes he may be Kasım Paşa, son of Sokollu Mehmed Paşa. It is a registered monument open to visitors. (Sources: Kırklareli Cultural Heritage Inventory, reg. 39-05-708; TÜRÜK Journal)