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The present castle building was constructed between 1283 and 1330 by order of King Edward I. The banded stonework and polygonal towers are thought to have been in imitation of the Walls of Constantinople. The impressive curtain wall with nine towers and two gatehouses survive largely intact. Caernarfon Castle is now under the care of Cadw and is open to the public. The castle includes the regimental museum of the Royal Welch Fusiliers.