Ják is a village in Vas County, on the western boundary of Hungary.

The parish church of Ják is the best preserved Romanesque church in Hungary. It was originally built as the church of a Benedictine monastery. The village church at that time was a rotunda in front of the façade of the main doorway of Ják church.

Both outside and inside the church is adorned with rich sculptures. The 3 naves and 3 apses are formed in a basilica structure. Columnar capitals are sculptured by plant and some animal ornamentation.

The rotunda has been built with 4 apses and 2 floors.

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  Saint George's Abbey, Ják
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  Medieval relief of Saint Matthew in the Church of Ják (13th century).
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  Saint James's Chapel, Ják

• Dezső Novák (1939 – 2014), Hungarian footballer

• Aradi N. (Ed.): A művészet története Magyarországon. (The History of Arts in Hungary). Gondolat, Budapest
• Fülep L. (Ed.): A magyarországi művészet története. (The History of the Hungarian Arts). Budapest
• Gerevich T.: Magyarország románkori emlékei. (Die romanische Denkmäler Ungarns.) Egyetemi nyomda. Budapest, 1938.
• Gerő L. : Magyar műemléki ABC. Budapest, 1984
• Gervers-Molnár, V. (1972): A középkori Magyarország rotundái. (Rotunda in the Medieval Hungary). Akadémiai, Budapest
• Henszlmann, I. (1876): Magyarország ó-keresztyén, román és átmeneti stylü mű-emlékeinek rövid ismertetése, (Old-Christian, Romanesque and Transitional Style Architecture in Hungary). Királyi Magyar Egyetemi Nyomda, Budapest
• Marosi E.: A román kor művészete, (Art of the Romanesque Ages). Corvina, Budapest, 1972, ISBN 963-13-2000-6

• Street map (in Hungarian)
• Aerial photographs of Ják