Historical Grynau along the shores of the Linth river and canal at the head of the Upper Zurich Lake (Obersee), St. Gallen, Switzerland Stock Photo - Alamy
Schwytz Schwyz : le chateau de Grynau Schloss Grynau
Grynau Castle - Wikipedia
ETH Zürich - ETH-Bibliothek - E-PICS - ETHBIB.Bildarchiv - LBS_L1-810934