St. George's Abbey, Benedictine monastery in Isny im Allgäu, Germany

St. George's Abbey is a former Benedictine monastery in Isny im Allgäu. Its church, built by Giulio Barbieri between 1660 and 1666, has an onion dome added in 1709 and a Rococo interior by Johann Georg Gilt and Johann Michael Holzhey from 1757–58. The monastic buildings, used as a castle after 1806, stand around the church.

The monastery was founded in 1096 by the Counts of Altshausen-Veringen and received papal approval in 1106. It survived fires in 1284 and 1631 that destroyed earlier buildings, before the current church was constructed from 1660 to 1666.

The monastery was the religious and economic heart of Isny for centuries, shaping how the town grew and functioned. Monks managed the surrounding lands and organized the market, which helped make the town prosper.

The abbey is centrally located at Kirchplatz and easily accessible on foot. Visitors can tour the church on most days, though access may be limited during services or special events.

The church was designed by architect Giulio Barbieri, an Italian master who shaped southern German baroque design. His work at the abbey stands as one of the most important architectural achievements of his era in the region.