Mob Quad is a four-sided group of buildings from the 13th and 14th centuries in Merton College, Oxford, surrounding a small lawn. It is often claimed to be the oldest quadrangle in Oxford and elsewhere, although Merton's own Front Quad was actually enclosed earlier and Corpus Christi College, Cambridge, says that its own Old Court is the oldest structure of its type in either Oxford or Cambridge. The quadrangle pattern has since been copied at many other colleges and universities worldwide.