Schloss Frauenstein, Medieval castle in Frauenstein, Austria.

Schloss Frauenstein is a late Gothic castle in the municipality of Frauenstein in Carinthia, north of St. Veit an der Glan, built on a rocky terrace above the village. A small fortified complex with a Romanesque round tower stood here in the 12th century; the present four-winged building around a paved courtyard was largely completed in the first half of the 16th century. Three round towers mark the corners, while the south-east corner has a square oriel with a small pointed turret, and a round chapel tower is set into the north wing.

A document from 1195 names Gundachir de Fovnstaine, the earliest recorded reference to the site. In 1413 Heinrich Färber was enfeoffed with a tower at Frauenstein, and in 1504 Agnes Färber brought the castle to the Welzer family through marriage. Christoph and Agnes Welzer completed a large new east wing in 1519, and a 1588 enfeoffment to the Trautmannsdorfs is recalled by a sundial in the courtyard.

The castle is in private hands and not open for exhibitions or concerts. Its name recalls the medieval Frauenstein family, documented from 1195 with Gundachir de Fovnstaine; the line ended with Hans von Frauenstein, burgrave at Kraig in 1376. A tablet on the south gate of the service building records Christoph and Agnes Welzer's new building, completed in 1519.

The castle is in private ownership and not open to the public, so visits are limited to the exterior. It stands on a rocky terrace in the village of Frauenstein, north of St. Veit an der Glan, and serves as a starting point for hiking trails to the ruins of Burg Freiberg and the Kraiger Schlösser.

The 12th-century round tower was kept when the castle was rebuilt in the first half of the 16th century, now linking the west and east wings. A wall walk with a vertical drop opening is built into the roof structure. The chapel tower's portal bears the year 1521.