Sommeregg is a medieval castle near Seeboden in the Austrian state of Carinthia, Austria. It is situated in the foothills of the Nock Mountains at an altitude of 749 m.
During the feudal period, Sommeregg was the seat of the Lord and Burgrave of Sommeregg until 1652. In 1442 the Sommeregg District Court was able to become independent from the County of Ortenburg, which led to an upgrading of the rule.
The fortress served as an administrative seat in the Upper Carinthian estates held by the Counts of Ortenburg and Celje; it later was the residence of the Graben and Khevenhüller dynasties; ministeriales of the Austrian House of Habsburg.
Wikipedia https://en.wikipedia.org/wiki/Burg_Sommeregg
Coordinates 46°50'3.476" N 13°31'22.805" E