with 16 businesses in this sector. The historical population is given in the following table: Heritage sites of national significance The Swiss Reformed Church of Waltensburg/Vuorz with frescoes, the prehistoric settlement and medieval castle at Jörgenberg, the Richtstätte / Galgen Fuortgas and the ruins of Kropfenstein Castle are listed as Swiss heritage sites of national significance. Archeological excavations on the Jörgenberg have uncovered traces of a Bronze Age settlement, an Iron Age Raetian settlement and some Roman items. The Reformed parish church of St. Leodegar was first mentioned in 1241. The frescoes are the work of the unknown Waltensburg Master and were done between 1350 and 1450. References Breil/Brigels Former municipalities of Graubünden Cultural property of national significance in Graubünden