Église Sainte-Trinité, church in Château-Gontier-sur-Mayenne, Mayenne, France

Église Sainte-Trinité is a church in Château-Gontier-sur-Mayenne, in the Mayenne department, adjoining the Ursuline convent whose church it was. The photograph shows a pale beige, rough-textured nave with two tall arched windows of clear glass and a side door reached by steps with a metal handrail. On the right stands a taller white facade with vertical grooved pilasters, a large arched window with dark panes, a sculpted relief panel of figures and a red double door. The roof is dark grey slate, with a small cupola on the left and a larger lantern tower on the right, each topped by a cross.

The building was constructed in the 17th century for the Ursuline order and received historical monument status in 1969. This classification recognized its architectural value and importance to the town's heritage.

The church adjoins the Ursuline convent, whose church it was, and its name refers to the Trinity. The building has been listed as a monument historique since 1969.

The church stands beside the former Ursuline convent in Château-Gontier-sur-Mayenne, in the Mayenne department. The sources give no street address, so orient yourself by the adjoining convent rather than a house number. Access depends on parish use, so confirm opening before travelling.

The building forms an architectural ensemble with the adjacent former Ursuline convent, showing how religious communities were historically organized together. This spatial connection helps visitors understand the historical relationship between convent and church.