02. Halkerstone Tower
John Halkerston was a Scottish architect, prominent in the 15th century. He was Master of Works at Trinity College Kirk, Edinburgh, in the 1460s. Around the same time, he worked on St John’s Kirk, in Perth.
On the north west corner of the church is the Halkerston Tower, which before the Reformation was the main entrance to the kirk for the laity. Internally it has a ribbed vault dating from the 15th century, but externally it has been much altered. It is now used as the bride’s entrance to the church at weddings.