The capital city of Bulgaria is Sofia. Located in the western part of the country, Sofia is one of the oldest cities in Europe, with a history that spans over thousands of years. It is known for its rich cultural heritage, beautiful architecture, and as a center of education and politics. Key landmarks in Sofia include the Alexander Nevsky Cathedral, the National Palace of Culture, and various museums showcasing Bulgaria's history. Sofia also serves as a hub for commerce and industry and is a gateway for tourism in the region.