The church takes its name from Saint-Germain, bishop of Auxerre, who passed to Argentan
around 435.
Its construction began in the 15th century and was completed in the 18th century,
resulting in a mixture of architectural styles.
It thus presents to the north a majestic porch which dates from the 15th century,
a Gothic nave and transept and a Renaissance apse.
The lantern tower, integrated into the main building, rises above the transept crossing. 
It is characteristic of large “Norman-style” churches.
The building has been classified as a historic monument in 1886 and 1889.