Conway Castle was built by Edward I as part of his mission to subdue the Welsh in the north of Wales. The castle was designed by Edward's master castle builder, James of St. George and it consists of eight drum towers with thick walls in between and is oblong in shape. The village that was built beside it was fortified by a strong wall with 21 towers and 3 gates. Building work started in 1283 and the castle was mostly complete within five years.
After capturing Dolwyddelan, Edward moved up the river Conway to its mouth and a new castle was ordered. The castle's design and size were chosen to prove the royal power of the English King. The construction took until 1297.
After spending Christmas at Conway castle Edward's attempts to defeat the Welsh were hampered by bad weather and losses of supplies to the Welsh. He held his position at Conway castle waiting for improved weather and to receive supplies by sea.