A 35m (115-foot) high Mediaeval square tower prominent on the skyline of St. Andrews, all that remains of the church of St. Regulus or St. Rule which was probably built in the 11th Century.
It stands immediately southeast of the ruined St Andrews cathedral that succeeded it in the 12th century. The tower is dedicated to the Greek monk St. Rule who is said to have brought the relics of St. Andrew, Scotland's patron saint, from Patras c. AD 345 to prevent them from being taken to Constantinople by the emperor Constantine.