180 hectares The museum, which was built between 1406 and 1420, consists of 980 structures and spans 72 hectares (over 180 acres). It has nearly 1.8 million works of art, the most of which are from the imperial collections of the Ming and Qing dynasties. There are also extensive collections of calligraphy, paintings, and sculptures by Chinese and international artists. It is one of the four major museums in Beijing. The others are the National Museum of China, Palace of Fine Arts and Temple of Heaven. The Palace Museum is open daily except on Chinese New Year's Day, Labor Day, and Public Holiday; it is closed on Easter and Christmas Day. The entrance fee is 100 RMB for adults, 70 RMB for students, and free for children under 17 years old. An additional 10 RMB fee is required to enter some special exhibition rooms. English-language tours are available upon request. You can find more information about visiting hours and ticket prices on the website. There are two main entrances to the palace museum. The original entrance is located within the walls of the inner courtyard, next to the Altar of State for receiving prayers for prosperity from citizens of both China and abroad. This is a large stone gateway with five arches that leads into a large square surrounded on all sides by halls containing galleries of exhibitions.