St. Nicholas' Church, Gothic church in Isny im Allgäu, Germany.

St. Nikolaus is a three-aisled pillar basilica whose 1288 Romanesque nave walls, round-arched north clerestory windows and interior arcades survive, with a late Gothic choir added in the 15th century. The tower carries a Baroque onion dome, and the two-storey sacristy with the preacher's library adjoins the nave.

The church was founded in 1288 and shaped the town's skyline ever since. A major city fire in 1631 destroyed most of the building, but the choir and sacristy survived, allowing for reconstruction in 1636.

The church is named after St. Nicholas, and the Reformation was introduced in Isny in 1522, making it the town's Protestant parish church. The six-sided pulpit of 1642 (or 1654) shows the four Evangelists, and its crown-like canopy carries a figure of John the Baptist pointing to the lamb.

The interior can be entered on weekdays and during services, with Sunday mornings being the best time to visit. Access is straightforward from the town square, and a visit typically takes under an hour.

The preacher's library above the sacristy ranks among Germany's oldest preserved library rooms and holds medieval treasures. This hidden collection is often overlooked by visitors, yet it bears witness to centuries of intellectual activity.