Main Quadrangle , or more commonly Main Quad or simply Quad , is the heart and oldest part of Stanford University in California . The collection of connected buildings was started in 1887 and completed in 1906 . The Quad was damaged in the 1906 earthquake , repaired , less severely damaged in an 1989 earthquake , and repaired again . The exteriors have remained almost the same since the beginning , though the interiors of most of the buildings have changed radically . The Main Quad is still used for its original purposes of teaching , research , and administration
1906 earthquake
1906 San Francisco earthquake
Main Quad (Stanford University)