St Andrews Cathedral, located in St Andrews, Fife, Scotland, is a ruined cathedral that was once the center of the Medieval Catholic Church in Scotland. Built in 1158, it served as the seat of the Archdiocese of St Andrews. However, after falling into disuse during the 16th-century Scottish Reformation, the cathedral was abandoned and left to ruin. The impressive ruins, including the east and west gables, stand as a testament to its former grandeur and are now under the care of Historic Environment Scotland.