Dunbar, town (1991 pop. 6,015), East Lothian, SE Scotland, on the North Sea. It is a fishing center and seaside resort. Dunbar Castle was held by "Black Agnes," countess of Dunbar, against a six-week siege by the English in 1338. Mary Queen of Scots was abducted to the castle by the earl of Bothwell and stayed there the night before her defeat at Carberry Hill (1567). The 1st earl of Murray razed the castle in 1568. Oliver Cromwell defeated the Scots at Dunbar in 1650.