Many school buildings constructed during the 19th and 20th centuries used Collegiate Gothic architecture. Much of the Princeton University campus reflects this style. Among them at this Ivy League school is a standout, visual gem. The Richardsonian Romanesque design of Alexander Hall is outstanding. In the center is a large rose window made of Tiffany glass. Carved into its red granite walls are bas-relief figures representing learning in 36 fields of education.