St George Rotunda Church among the Ruins of the Ancient Town of Serdika, Sofia, Bulgaria Stock Photo - Image of europe, ancient: 187285636
Ancient Serdica (Best Things to See and Best 5 Vegetarian Restaurants) - ConnollyCove
Archaeological Complex Serdica, Sofia, Bulgaria Touted as the latest tourist attraction the remains of Roman Sofia are on display to the public Stock Photo - Alamy