Underground City Found Underneath Architect Sinan's House During restoration of the architect Sinan's house in the town of Kayseri, a Central Anatolian city in Agirnas, an underground city was found. Approximately 4000 square meters of the city, the age of which cannot be estimated, have been excavated so far. Nuvit Bayar, the Project Director of Guntas, the company responsible for the restoration, says, "We plan to finish this delicate job, which has been going on for two years, by the end of this month." Saying that when looked at from outside, Sinan's house looked like a two-story building, Bayar said...