The Protestant church, built between 1837 and 1842, appears as a vast octagonal rotunda, covered with a slate roof, preceded by a covered parvis and surmounted by a small bell tower arch. Inside, the space could accommodate up to 500 worshipers. Eight strong wooden pillars support the galleries and the 18 meters high dome covered with painted wood panels. Large windows surmounted by a semicircular arch light the interior. The simple, sleek lines, the balanced proportions produce an impression of harmony. The massive use of wood give this temple excellent acoustics, much appreciated by the artists performing every year during summer concerts.