The church of Heimsbrunn, whose patrons are Saint Projet and Saint Amarin, was built in 1768. Its bell tower is topped by a spire erected in 1862 by the famous Mulhouse architect Jean-Baptiste Schacre. The church has a Callinet organ from the 1830s. Behind the town hall, house N°21 rue de la Cure has original half-timbered walls (16th or 17th century).