Burgruine Ramschwag, Medieval castle ruin in Nenzing, Austria

Burgruine Ramschwag is a medieval castle ruin perched on a hilltop with steep slopes near Nenzing, featuring a central residential tower and a ring wall enclosing a courtyard measuring roughly 42 by 38 meters. The walls display the typical construction of a defensive stronghold built from stone with substantial thickness for protection.

Built between 1270 and 1290 by the Ramschwag family from the Swiss canton of St. Gallen, the castle was sold a few years later and passed in 1352 to Count Rudolf III of Montfort-Feldkirch. In 1360 it came to the Habsburgs and in 1391 joined the Vorarlberger Eidgenossenschaft. On the night of 28–29 September 1405, during the Appenzell War, rebellious Walgau farmers destroyed it; it has been a ruin since.

The name Welsch-Ramschwag distinguished this castle from the family's Swiss seats of Alt- and Neu-Ramschwag in Häggenschwil, because the local population then spoke Rhaeto-Romanic. The Ramschwag family is remembered by the Habsburgs for Heinrich Walter von Ramschwag, who saved Rudolf of Habsburg's life at the Battle on the Marchfeld in 1278. In thanks the family received the Reichshof Kriessern, including the community of Mäder, and the toll at Lindau.

The ruins are accessible from Nenzing center via marked trails and feature information panels about medieval history and construction. Visitors should wear sturdy shoes since the climb is steep and the paths are uneven.

The castle is also called Welsch-Ramschwag because the local population spoke Romansh, distinguishing it from the family's Swiss ancestral seats of Alt- and Neu-Ramschwag in Häggenschwil. In 1947 a ski jump was built on the site, destroying parts of the ruin; restoration followed from 1997 to 2000.