Ruine Hohenberg, Medieval castle ruin in Hohenberg, Austria.

Ruine Hohenberg is the ruin of a hilltop castle in the market town of Hohenberg in southern Lower Austria, in the Lilienfeld district. Of the former complex, surrounded by a double wall and a ditch with a gate tower, zwinger, outer bailey and triangular courtyard, only the outer defensive wall and a remnant of the chimney stack survive.

Burg Hohenberg was built in the 13th century by Dietrich von Hohenberg, son of Leutold von Hohenstaff. In 1619 Emperor Ferdinand II had the Protestant Jörger family's estates confiscated; Hohenberg was stormed and set ablaze by Hans Balthasar von Hoyos's troops. The Hoyos family received it as a fief in 1627, and by 1672 it was already depicted as a half-ruin. Structural securing took place from 1956 to 1964, and volunteers and a scout association repaired railings and paths between 2005 and 2007.

The ruin is a protected monument (Denkmalgeschütztes Objekt). Since 2005 a group of volunteers and a scout association have cleared scrub, installed railings and repaired the trails, and since 2007 residents and hikers visit regularly. At the outer gate a documentation site shows the "Spielbichler pictures" of the castle in earlier times.

The ruins are accessible year-round via walking paths that lead up from the nearby village of Hohenberg. Sturdy footwear is helpful since the paths can be steep and uneven in sections.

The ruin still displays original medieval construction techniques because portions of the walls remain in their original form. These authentic details give visitors a direct view of the craftsmanship methods that builders used hundreds of years ago.