St Andrews castle’s mine and counter-mine is of Europe’s most extraordinary examples of siege engineering.On the 1st of March 1546, in front of the castle walls, the Protestant preacher George Wishart was burned for heresy at the behest of Cardinal David Beaton, Archbishop of St Andrews.On the 29th May 1546, a group of lairds sought revenge, and managed to breach the castle disguised as masons in the small hours of the morning.Despite pleading for his life, Beaton was slain. His naked body was d