The area had at least been settled since
Roman times, when it was part of the
Noricum province; documented by preserved sections of
Roman roads and tombstones, as well as by excavations of an ancient
villa rustica near the village of Tigring. Moosburg proper is the site of the
Arnulfsfeste, a hill castle first mentioned in an 879 deed. It was then located in the former Slavic principality of
Carantania, which had become a Frankish
march by the end of the 8th century.
Arnulf of Carinthia, the
Carolingian king of
East Francia and
Holy Roman Emperor, grew up here and used the castle as a
Kaiserpfalz residence. Part of the
Duchy of Carinthia from 976, the Moosburg estate was later held by the noble
House of Gorizia (
Görz) which finally lost their remaining Carinthian possessions to the
Habsburg emperor
Frederick III about 1460. In the 16th century, the former Carolingian fortress was replaced by nearby Moosburg Castle and decayed. The
Gothic Sts Michael and George parish church was first mentioned in a 1368 deed, it was rebuilt after demolitions by
Ottoman forces in 1479. A
Baroque east facade was added in the late 18th century. The present-day municipality was constituted in 1850, it has obtained the status of a market town in 1997. ==Politics==