Castle of Döbrönte, castle ruins in Döbrönte, Hungary

Castle of Döbrönte stands on a rocky outcrop with wall sections reaching 2 meters thick, displaying window openings from various construction phases. The ruins preserve parts of the inner castle walls and outdoor fortification structures that visitors can explore today.

King Louis I granted Himfy Benedek, ispán of Pozsony, permission in 1367 to build a stone castle on his Döbrönte estate. By the early 15th century the Himfy family's influence had declined; in 1401 the Gyulaffy of Rátót attacked and plundered the fortress. After the Himfy fell to brigandage and sacked the Szent Márton-hegy abbey in 1464, King Matthias Corvinus confiscated their lands and gave them to Baron László Kanizsai.

The castle shares its name, Szarvaskő, with a fortress in Szarvaskő, Heves County. On 17 March 2018 the president of the Szarvaskör Association and the mayor of Szarvaskő signed an agreement making the two castles twin fortresses, the first such partnership in Hungary. The ruins are also part of the third phase of the National Castle Programme.

The ruins lie on the western side of the Bakony at Döbrönte, and the walls were partly restored in the early 21st century, though much of the structure still lies underground. Paths to the site are rough, so sturdy footwear helps. The castle is a site of the third phase of the National Castle Programme.

The castle was never counted among the significant border forts: in 1547 the Pozsony diet hired only five mounted soldiers to enlarge its small garrison. After it fell into ruin, the surrounding population carried off its stones, and restoration of the walls began only in the early 21st century.