Conwy Castle () is a castle that was built in the Middle Ages. It is in Conwy, in the country of Wales. It was built by Edward I of England. He built it after he went to Wales and took over control of it, conquering it. He built it between the years of 1283 and 1289. It is part of the city walls. It cost £15,000 to build. The castle has survived wars like Madog ap Llywelyn. Richard II of England hid there in 1399. Owain Glyndŵr took it over in 1401, too.