Introduction to historical artifacts: The museum has five main exhibition halls: The Prehistoric Hall mainly displays exhibits from 1.6 million BC to 1600 BC, including discoveries in caves near Bulgaria, early human tools, paintings, pottery and sacrificial objects. etc.; the treasure hall displays treasures found in ancient tombs; the exhibits in the main exhibition hall include a variety of archaeological finds from ancient Thrace, ancient Greece and ancient Rome; the medieval exhibition hall collects medieval books, paintings, metal products and wood products, and other A collection with the characteristics of the times.