the time of the Hohenstaufen emperors in the 12th to early 13th centuries, some bishops of Chur were appointed by the emperor, which for a period led to existence of two bishops at the same time, the other being appointed by the pope. In the 14th century bishop Siegfried von Gelnhausen acquired the imperial diocese of Chur from the Barons Von Vaz and represented emperor Henry VII in Italy.

In 1803 the see became immediately subject