Azerbaijan has a National Library in Baku with 4.4 million volumes. There are 115 recognized museums in the country, 27 of which are art museums, and there are 20 theaters. The country also has 6,571 monuments and historic sights. The Ichari Shahar, or Old Town, in Baku has the Shirvanshah Palace, an architectural monument from the 15th and 16th centuries which has been restored and is now a museum. Other museums are the Museum of History of Azerbaijan (1920), which exhibits archeological, ethnographic, and other relics; the Rustam Mustfayev Azerbaijan State Arts Museum, displaying works of Azerbaijani, Russian and West European artists from the 15th– 19th centuries along with the works of modern Azerbaijani artists; the State Museum of Azerbaijani Carpets and Folk and Applied Art; and the Nizami State Museum of Azerbaijani Literature, depicting the stages of literary development. The Gobustan Museum features prehistoric dwellings and cave paintings over 10,000 years old. Baku, the capital, remains an important cultural and intellectual center in Transcaucasia.