Lemberg Castle, Medieval castle in Vojnik, Slovenia

Lemberg Castle comprises ruins of a fortress sitting on Schlossberg hill at about 458 meters elevation and showing wall fragments and chapel foundations. The remains spread across different levels, with only portions of the original structure still visible.

Lemberg Castle is first mentioned in a 1213 charter, where Eberhard of Lemberg appears as a witness. The lords of Ptuj held it from 1271 until their family died out in 1438, though the Bishop of Krško had granted it to the Counts of Celje in 1387. In 1452 Frederick II of Celje had it destroyed; the Schaunbergs rebuilt it in Baroque style, and in 1584 Viktor Welzer remodeled the entrance wing and arcaded corridor in Renaissance style.

The castle is named after the Lemberg family, whose Eberhard signed a 1213 charter as "de Leuburch". Count Wolfgang Hannibal von Schrattenbach, born here in 1660, is remembered by a two-metre portrait now held by the British Museum in London. After 1945 the castle was nationalised and much of its furnishings dispersed; some objects are kept by the Celje museum.

The castle stands on a rocky promontory above the village of Lemberg pri Novi Cerkvi, along the road between Nova Cerkev and Dobrna in the Vojnik municipality. It is reached on foot from the village; the walk climbs to the ridge. The cellars under the north wing are the oldest surviving part, while the entrance tract and arcaded corridor from 1584 show the Renaissance rebuilding.

The two-metre portrait of Count Wolfgang Hannibal von Schrattenbach, born at the castle in 1660, is now held by the British Museum in London, while only a few pieces of the castle's former furnishings remain in the Celje museum.