The Château de Kérouzéré is a 15th-century Breton castle (or manor-house) in the commune of Sibiril in the Finistère département of France. The castle was built in granite in the first half of the 15th century for Jean and Yves de Kérouzéré, seneschal of Morlaix, and followers of the dukes of Brittany. Visible from the sea, Kérouzéré was dangerously exposed and was particularly vulnerable to English attacks. As such the duke permitted him to erect a single tower of more than twenty-four feet in width with crenellations and ditches. This construction caused a major controversy with the neighboring seigneur of Kermorvan. As a result, from 1466 the building was still unfinished and, in 1468, François II had to grant a second authorization for its completion. The original tower is the part of