Église Saint-Germain de Rennes, Gothic church in central Rennes, France.

Église Saint-Germain is a Gothic church in the center of Rennes built with granite that features a rectangular floor plan and a striking large window on its western wall. The structure has a simple flat eastern chevet that gives the interior a sense of openness and light.

Construction of the current structure started in 1470 and continued for more than 200 years until 1690. It replaced an older 12th-century church that had occupied the same site along with its cemetery.

The parish served Rennes's wealthy merchants and later the parliamentarians of the Breton Parliament. Its south porch was built in the late Renaissance (1606-1623) by Germain Gaultier, the first architect of the Parliament of Brittany palace. The tower, erected 1519-1550, was originally the belfry of the town guardhouse and was ceded to the parish in 1651.

The church stands in the ville-neuve, its south flank running along Place Saint-Germain; the south porch of 1606-1623 by Germain Gaultier is the usual entrance side. The flat west wall is cut at an angle on the south-west corner, following the line of the old Roman road Rennes-Angers, now Rue du Vau-Saint-Germain. Inside, the organ installed in the 19th century blocks the great west window.

The oldest stained glass in Rennes, on the south side, was reassembled in 1860 from intact panels showing the lives of the Virgin, Saint Anne and Saint Joachim, the Passion and Saint John the Evangelist. The choir's main window is a jumble of 16th-century fragments found by chance in a barrel in the 19th century and pieced together without order.