The focal point of the college, as well as its oldest building, is the late 15th century King's College Chapel. A number of other historic buildings remain, with others being subject to renovation and rebuilding in the 18th and 19th centuries. In the early 20th century, a great deal of expansion saw the university buildings increase around the historic college buildings. In the later 20th century, the university expanded dramatically in size, dominating Old Aberdeen and expanding out from the High Street with a number of modern buildings.