From the early 14th century, geographic names from the Wetterstein Mountains began to be recorded in treaties and on maps, and this trend intensified in the 15th century. In 1536 a border treaty dating to 1500 was refined in that its course was specified as running over a Schartten (wind gap or col). In the 17th century the reference to this landmark in the treaty was further clarified as now known as the Zugspüz (jetzt Zugspüz genant). The landmark referred to was a wind gap on the summit of the Zugspitze and is used time and again in other sources. During the Middle Ages Scharte was a common name for the Zugspitze.