Castle of Sátoraljaújhely, Medieval castle ruins in Sátoraljaújhely, Hungary.

The Castle of Sátoraljaújhely is a medieval ruin perched on a hilltop with remaining stone walls and towers overlooking the surrounding Zemplén Mountains. The structure displays typical features of a mountain fortress with multiple levels and defensive positions.

The first documented mention dates to 1261, shortly after the Tartar invasion, when it functioned as a defensive position in northeastern Hungary. It played a key role in protecting the region from external threats throughout the medieval period.

The castle carried two names: Patak, because it belonged to the Patak forest estate and later lordship, and Újhely, because it stood outside the town of Sátoraljaújhely. The 1261 foundation charter of Újhely obliged townspeople who fled into the castle to keep its cistern filled and to obey the castellan in danger.

The ruin lies on the 334-metre Várhegy ridge southwest of town, above the road toward Sárospatak. The summit is a narrow plateau about 95 metres long and 25 metres wide, edged by a natural rim, with a rampart running below its eastern and south-eastern edge. A radio transmitter now stands near the north-eastern part of the plateau.

The castle is also known as Patak Castle: it belonged to the Patak forest ispánate and later estate, while "Újhely" refers to its position outside Sátoraljaújhely. Mihály Détshy proved this identity in a 1966 study. Excavations led by István Ringer from 2008 uncovered a 3 m thick wall and a Gothic sedile in a central building.