清华大学图书馆首建于１９１９年，为美国建筑师亨利·莫菲所设计。那是２０世纪之初美国校园中常见的风格：清水红砖墙，重点部位用石材，青紫斑斓的石板瓦，有些拱窗、牛腿等处理。１２年后杨廷宝老师完成了他那在中国近代建筑史中成为名例的杰作———清华图书馆的扩建。杨 Tsinghua University Library was first built in 1919 and was designed by American architect Henry Murphy. It was a common style in American campuses at the beginning of the 20th century: the clear water red brick wall, the key parts were made of stone, colorful blue-and-white slate, some arched windows and corbels. After 12 years, Yang Tingbao completed his masterpiece in the history of modern Chinese architecture --- the expansion of Tsinghua Library. Young