Duchy of Swabia
Duke of Teck is a title which was created twice in Germanic lands. It was first borne from 1187 to 1439 by the head of a cadet line of the German ducal House of Zähringen, known as the "first House of Teck". The "caput" of his territory was Teck Castle in the Duchy of Swabia (from 1512 part of the County of Württemberg).