Appearing as a witness as early as 1075 in a document from Archbishop Udo of Trier was a man named Albert von Merkedesheim. In 1437, Rorich of Merxheim bore arms gules a bend argent with three roses of the field, the composition now seen on the dexter (armsbearer's right, viewer's left) side in Merxheim's arms. Earlier, in 1128, Rorich and Gerlach of Merxheim were witnesses in a document from Archbishop Adalbert of Mainz. The "Vögte" of Hunolstein were the ones who held sway over the village the longest. A reduced form of their arms can be seen in the base of Merxheim's arms. Their full arms are shown at right. Seen on the sinister (armsbearer's left, viewer's right) side in Merxheim's arms is a charge depicting, in stylized form, a building that for centuries was Merxheim's defining landmark, the old "Nürnberger Turm" (“Nuremberg Tower”), which burnt down in the great fire that beset the village on 24 July 1870. A memorial to it now stands on a roundabout in Merxheim. It appears with its singular half-hip roof.