Berum Castle, Medieval castle in Hage, Germany.

Berum Castle is a medieval fortress in Hage featuring thick stone walls, defensive towers, and multiple residential buildings constructed over several centuries. The structure displays typical characteristics of northern German castle architecture with its compact layout and reinforced defensive systems.

Berum Castle is first documented in 1310 as the seat of a Syrtza family chieftain of the Norden area; a stone house is mentioned in 1408. In 1443 Count Ulrich I expanded it into a three-winged château with a front castle, and in 1600 the Treaty of Berum was signed here, bringing the Harlingerland to East Frisia. The main castle was demolished in 1764.

The castle's name comes from the Berum district, and the surviving gate passage carries the coat of arms of Princess Christine Charlotte in its pediment. The Berum Treaty was signed here on 28 January 1600, bringing the Harlingerland to East Frisia. The site is privately owned and lived in by the von Oppeln-Bronikowski family, so it is seen from outside.

The castle is privately owned and lived in by the von Oppeln-Bronikowski family, so only the outer grounds, the gate passage and the remains of the 1712 Baroque garden to the south can be viewed from outside. The gate portal is flanked by two columns and its pediment shows the coat of arms of Princess Christine Charlotte. The wall and outer moat survive and frame the approach.

The baroque gate passage flanked by two columns bears the Württemberg coat of arms of Princess Christine Charlotte, who lived at Berum as a widow from 1690 to 1699. South of the surviving front castle, remains of the Baroque garden laid out in 1712 are still visible.