1 Answer

Building work began in 1277 under Richard L'Engenour, who would later become Mayor of Chester in 1304. The castle and its earthworks were built by 1,800 laborers and masons using local Millstone Grit ashlar and sandstone. In November 1280, the Savoyard master mason James of Saint George began overseeing construction at Flint for Edward I. He remained at the castle for 17 months. James of Saint George then moved onto Rhuddlan to oversee its completion.
When work ceased in 1286, Flint Castle had an inner ward and an outer bailey. They were separated by a tidal moat and were connected with gatehouse and drawbridge. A plantation town was also laid out beyond the outer bailey. The inner ward had three large towers and a detached keep. This isolated tower protected the inner gatehouse and outer bailey. In total expenditure, Edward I spent £6068.7.5d. creating the fortress and the town (£2.5 million as of 2008).
Flint, which was sited on the western shore of the River Dee estuary, could be supplied by river or sea. Its harbour was protected by a defensive wall. The castle lies opposite to the English shore and Shotwick Castle in England. Before the river's course was drastically changed in the 18th century, passage across the estuary at this point could be made directly by boat at high tide or by fording at low tide.