In July 1542 George Wishart returned to Scotland from the Continent where he had gone to escape persecution. Wishart was a wonderful preacher, so a great boon to the growing Reformation. He began preaching in Dundee, staying there until he felt he was putting his congregation at risk. He then went to Ayr and Kyle, the land of the Lollards, where the churches were closed to him, so instead he spoke to thousands outside.
Wishart preached at the Mercat Cross (it has since been moved).
The Mercat Cross was approximately where the traffic lights are in the right corner.