Explore the historical heart of Sofia by foot on a 3-hour private tour, learning about the city’s ancient, medieval, and modern history from a private guide. As you walk, take in Sofia’s mix of architecture, and stop to visit the 4th-century St. George Rotunda Church and gold-domed Alexander Nevsky Cathedral. Plus, see other sights such as the statue of the ‘King Liberator,’ Banya Bashi Mosque, and more.