The Preaching of John Knox Before the Lords of the Congregation is an 1832 history painting by the British artist David Wilkie. It depicts the sermon given by the Scottish minister John Knox in St. Andrews on 10 June 1559, a key moment in the Reformation in Scotland. Knox's inflammatory words before the Lords of the Congregation signalled the end of Roman Catholic governance in the nation. The painting draws a sharp contrast between the outraged reaction of the Catholic bishops and zealous focus of the Protestant Lords. Between them is the Countess of Argyll who had mixed sympathies due to her support for the Protestant reformers and her relationship with her half sister the Catholic Mary Queen of Scots.