Ulmet, with its "Flurskapelle", was long before the Reformation already an ecclesiastical hub in the Glan valley. Duke Ludwig II began to introduce the Reformation into the Duchy of Palatinate-Zweibrücken in 1523. Belonging to the reformed parish of Flurskappeln in 1538 were the villages of Brücken (vanished), Dennweiler-Frohnbach, Erdesbach, Erzweiler (forsaken by its last few inhabitants in 1974 after having been incorporated into the Baumholder Troop Drilling Ground by the Nazis in 1933), Gumbsweiler, Oberalben, Pielsbach (now part of Ulmet), Rathsweiler, Ulmet and Welchweiler. In 1609, the parish, with the addition of Huffersweiler (later an outlying centre of Erzweiler), still had its old extent. From 1639 to 1671, Altenglan together with Bedesbach (with the vanished village of Sulzbach) and Friedelhausen, were united with Ulmet. From 1639 to 1652, Patersbach, too, was served from Ulmet. The reformed parish belonged originally to the Inspection of Lichtenberg, but passed to the Inspection of Limbach in 1815 and to the deaconry of Kusel in 1820. Over the course of the last two centuries, the following places have split away from the parish of Ulmet: Erzweiler (1816), Gumbsweiler (1820), Dennweiler-Frohnbach (1909), Oberalben (1920) and Welchweiler (1956), leaving only Ulmet, Erdesbach and Rathsweiler in the parish today.