St. Andrews Cathedral is a medieval ruin in the heart of St Andrews, Scotland, which was once the largest church in Scotland.
It was built in 1158 and became the centre of the Medieval Catholic Church in Scotland
It fell into ruin in the 16th century after The Protestant Revolution when the celebration of Catholic mass was outlawed in Scotland.
Firebrand Scottish Protestant preacher John Knox preached here declaring Catholicism heretical .The cathedral was then ransacked and its interior destroyed.
Stones from the ruined building were used as construction materials for other buildings in St Andrews.
The graveyard contains the graves of nearly two thousand people including many notable Scots such as Old Tom Morris, widely regarded as one of the founders of modern golf.