JASOV (Hungarian Jászó). - Premonstratensian abbey in Slovakia.
It was founded around 1220 and is today the sole survivor among the several Premonstratensian abbeys in Slovakia. The present building is a monument of Baroque art, erected by A. Pilgram in the years 1765–66. It is square, with the church at the centre. It possesses a valuable library.
In the time of its prosperity, until after the First World War, several colleges (Cassovia, Rosnavia, Gran Varadino, Gödöllő) and parishes depended on this monastery. On 7 June 1922 the Holy See erected J. into an abbey nullius with 10 parishes. This apostolic constitution, however, was not implemented, owing to the opposition of the Czechoslovak government. In 1949, besides the central monastery, the abbey had 2 convents (Cassovia, Lele) and administered 8 parishes. After the First World War it lost a large part of its property, and after the Second almost everything was confiscated. Indeed, the present government established an agricultural school in the monastery itself. During the present persecution of the Church in Czechoslovakia, the abbey of J., together with two other monasteries, was designated as a “concentration monastery” for religious, and on 14 April 1950 the Premonstratensians, Jesuits, and other religious of Slovakia were gathered there.