Biely Kameň (literally White Stone in English) are the ruins of a Gothic castle located on a wooded hill above the town of Svätý Jur in the Pezinok district in the Bratislava region, Slovakia.

[2] Biely Kameň served as a fortified seat above Svätý Jur since the 13th century until 1663 when it was finally abandoned by its owners.

[6][7][8] Biely Kameň was built at some point before 1271 on a hill opposite an older local fort situated across the valley and served as the seat of the svätojurská (St. George) line of counts from Svätý Jur and Pezinok.

The first written mention of the castle dates to 1271 when it was conquered by Ottokar II of Bohemia during his spring expedition to the Kingdom of Hungary.

This created a well-fortified stone fortress with several towers, enlarged storage spaces and an extended palace with a Gothic chapel.

Upon the death of the last count, ownership of the castle was seized by Ferdinand I, Holy Roman Emperor and King of Hungary.

The core of the entire fortified complex is the upper rampart of an approximately rectangular ground plan,[17] which was delimited around the perimeter by massive walls, still visible on the east side.