Castle in Kvasovo, Medieval fortress in Kvasovo, Ukraine

Castle in Kvasovo is a ruined triangular fortress on a rock above the Borzhava River, with walls up to 2 m thick and a round tower 9 m in diameter at its southern corner. Built from rough stone with brick inclusions, it preserves only foundations and wall fragments.

Kvasovo Castle was first documented on 8 May 1390, when King Sigismund of Luxembourg granted it to János Nagymihályi. It passed to the Bátori family, then to the Matuznai family in 1495. From 1557 to 1562 Pál Matuznai used it as a base for raiding neighbouring villages; in 1564 Lazar Schwendi's royal troops destroyed it, and Tatar attacks finished it off in 1567.

The castle's name comes from the village of Kvasovo (Kovászó in Hungarian), first recorded in 1390 when King Sigismund granted it to János Nagymihályi. By the 1550s Pál Matuznai used it as a base for robbing neighbouring villages, prompting the 1563 Pozsony diet to order an investigation. Royal troops under Lázár Schwendi destroyed it in 1564, and Tatar raids finished it off in 1567; it was never rebuilt.

The site is reached through the village of Kvasovo in Zakarpattia region, where local guides can explain the structure's features. Wear comfortable walking shoes as the ground is uneven and paths wind around the building.

The castle's name comes from the Hungarian Kovászó, and its ruins were long overgrown with ivy. A well carved into the rock in the eastern corner still marks the courtyard, and a side passage into the castle was found near the central well. The walls, up to 2 m thick, mix rough stone with brick.