Commissioned in 1416 [2], Grace Dieu was completed in 1418 and was one of the largest wooden ships of its time, measuring 66.4 meters (218 feet) in length. She weighed 1,400 tons[2].
Two other ships, Valentine and Falcon were built to escort her[2].
Grace Dieu and her escorts appear to have only set sail once, in 1420, under the command of the Earl of Devon[2]. The expedition sufferred a mutiny soon after leaving Southampton[2] and diverted to St. Helens on the Isle of Wight[2].