Tsinghua University is China's most famous university. Built in 1911, its predecessor was called Tsinghua Xuetang. When the excess of the Boxer Indemnity was returned to China by the Americans, the money was used to build a school to prepare students who were going to studying abroad in the United States. Four famous scholars--Liang Qichao, Wang Guowei, Chen Yinque and Zhao Yuanren--have all taught at Tsinghua University who are now called the "Four Tutors". The school is located on the site of Tsinghua Garden, a former imperial garden that is exquisitely beautiful. The western campus is the old campus, where the building arrangement is in an American style. The eastern campus was built in the 1950s in a Soviet style.