Église Saint-Georges (Saint-Georges church) - located within the complex of Caen Castle - is first mentioned in a text from 1082. Elements from this period have been preserved in the church. There are traces of windows from the Romanesque period and the triumphal arch was rebuilt in the 1100s. The Gothic windows date from the 14th and 15th centuries, and the choir and door were rebuilt at the beginning of the 16th century.

Inside, the nave is covered with a wooden roof structure that was built during the Hundred Years' War. Archaeologists have dated this to the years of the English occupation, around 1435.
The wooden bell tower disappeared in the 19th century when the church was converted into a service building for the army. The church was severely damaged by bombing at the end of the World War II and was restored from 1948 onwards. The new stained-glass windows were installed after 1970.

Today, Église Saint-Georges is an information centre for the history of the castle and a reception area for the two museums of Caen Castle.