The main parish church of Rueil-Malmaison has been a place of worship since at least the 12th century, though the current building is largely 16th and 19th century. Two historical figures are buried here, making it an unexpectedly significant stop.
Cardinal Richelieu, who owned the nearby Château de Rueil, was originally interred here before his remains were moved to the Sorbonne chapel in Paris. More permanently, Empress Joséphine lies in a marble tomb in the right transept, placed here after her death at Malmaison in 1814. The memorial sculpture by Cartellier depicts her kneeling in prayer. The church is free to enter and usually open during the day — worth a brief visit if you're in the town centre before or after the château.