Baldramsdorf is a municipality in the district of Spittal an der Drau in the Austrian state of Carinthia.

Ortenburg Castle, located on a rock above the Unterhaus settlement, was already documented in the 11th century; it was probably erected from about 1090 onwards and finished in 1140.

The former seat of the Counts of Ortenburg, who also founded the neighbouring town of Spittal in 1191, decayed after the extinction of the line in 1418.

The Habsburg emperor Frederick III, having seized the former Ortenburg estates, had Unterhaus Castle (Paternschloss) erected below the medieval fortress, it was rebuilt from 1710 onwards as a Hieronymite monastery at the behest of the local Porcia princes, in order to encounter crypto-protestant practises in the area.

The convent was dissolved in the course of the Josephinist reforms; the building today houses the First Carinthian Handicraft Museum.