In Tsinghua Yuan, the I-Shaped Hall, the Garden of Yichun, and the Palace of the Ancient Moon are some of the few remaining sites on the Tsinghua campus bearing original architectural features.

　 The I-Shaped Hall was the focal point of Tsinghua Yuan before the founding of the school. Taking an overview, the Hall resembles the Chinese character "I", with its two halls in the front and back connected by a short corridor in the middle. Now, references to the I-Shaped Hall indicate the ancient courtyard with the Hall as the central feature.

　 In its early days, the Hall had more than 100 rooms, covering an area of 2,570 square meters. Entering the Hall, one could see a number of small yards scattered around the winding corridors.

　 The I-Shaped Hall started out as the residence of the royal family. But in the years since the School's founding, it has become a favorite spot on campus due to its distinctive characteristics. When the School opened, the Hall housed the Business Center. When the Business Center closed, the Hall was used for classes, entertainment, and important speeches. For many years, the east room in the front section was used as the Music Center; the west room as the Reading Room for teachers, and the back section as the accommodation for distinguished foreign guests. The great Indian poet Rabindranath Tagore stayed there when he visited China in 1924.