caernarfon04 Eagle Tower This is the largest tower in the castle. It is ten sided and stands 128 feet high to the top of its three turrets. The walls are over 15 feet thick, there are four floors, each with a great chamber surrounded by smaller rooms and passages in the thickness of the walls. The Eagle Tower is traditionally the birthplace of Edward of Caernarfon (i.e. the first Prince of Wales), but at the time of his birth (25 April 1284) it is unlikely that much more than its foundations had been laid. The tower is named from three stone eagles known to have been placed with other heads and figures on the battlements of the turrets when the tower was being finished in 1316; most of them are now badly weathered, but the eagle on the West turret can still be recognized.