Restored at the beginning of the century, the Tour Leroy is the only high tower of importance remaining in the town. It formed part of the ramparts surrounding the Bourg-le-Roi and the castle. This relic marked the entrance to the town by river.
The Tour Guillaume-le-Roy (William the King Tower) was situated on one of the banks of the Odon. This second tower, which marked the entrance to the harbour on the other bank, has now disappeared. Apart from the towers at the town gates, this used to be the oldest tower of the enclosure. The founding charter of the Ladies’ Abbey mentions this wall, enabling historians to date the tower to probably the early 11th century at least.