St Mary's College is the most atmospheric of the University of St Andrews's medieval colleges, and its quadrangle — entered through an arched gateway off South Street — is one of the most peaceful corners of the town. The college was founded in 1537 and has housed the university's Faculty of Divinity ever since. John Knox studied and lectured here, and the college's library holds some of the oldest books in Scotland.
The quad is centred on a large thorn tree that, according to tradition, was planted by Mary Queen of Scots on her visit to St Andrews in 1563. Whether the attribution is accurate is debatable, but the tree itself is impressively old and gnarled. The buildings around the quadrangle range from the 16th to the 19th century and mix well, with the old tower of the college library at one end.
The college buildings are working university premises, but the quadrangle itself is generally open to visitors during daylight hours. It is quietest in the morning. The contrast with the tourist bustle on South Street outside — literally a few metres away — is striking and welcome.