Tirana is the capital and the largest city of Albania. Tirana became Albania's capital city in 1920 and now it has a population of more than 600,000. The city is home to many universities and is the center of the political, economical, and cultural life of the country.The main cultural and artistic institutions of Tirana are the National Theater, the National Theatre of Opera and Ballet of Albania, the National Gallery of Figurative Arts of Albania (Galeria Kombëtare e Arteve), and the Ensemble of Folk Music and Dances. Another cultural event includes performances of renown world composers performed by the Symphonic Orchestra of the Albanian Radio and Television. The city has been a venue for the Tirana Biennale and Tirana Jazz Festival. Tirana is home to historical and cultural sites: Tirana Castle (Kalaja e Tiranës), the historical core of the capital, The Clock Tower of Tirana (Kulla e Sahatit), Tirana's Mosque of Et'hem Bej (Xhamia e Tiranës), Tabak Bridge (Ura e Tabakëve), Terzi Bridge (Ura e Terzive), Skanderbeg Square as a monumental ensemble, Church of Kroi of Shëngjin (Kisha e Kroit të Shëngjinit), Prezë Castle (Kalaja e Prezës), Petrelë Castle (Kalaja e Petrelës),Kapllan Pasha's Grave (Varri i Kapllan Pashës). Tirana is Albania's major industrial centre. It has experienced rapid growth and established many new industries since the 1920s. The principal industries include agricultural products and machinery, textiles, pharmaceuticals, and metal products.