 During the 13th and 14th centuries, the Commandery lands grew with donations and purchases from local nobles.At the height of their power, they owned land in Oberaargau, the Bernese Seeland and around Solothurn.They bought vineyards in Twann and rights over village churches in Lotzwil, Ursenbach, Egerkingen, Aetigen, Rohrbach and Waldkirchen (now part of Niederbipp).