The church was constructed on an island intentionally created by diverting waters from the Wieprz River.
The architectural design is characterized by a central plan, rare for small parish churches of that period in Poland.
The interior frescoes were executed by Łukasz Smuglewicz, a notable Polish painter of the Enlightenment period.
The building was designed to commemorate the patron saint of bridges and protectors against floods, Saint John of Nepomuk.
The church remains surrounded by the historic Ordynacja Zamojska park complex.
Saint John of Nepomuk Catholic Church, often called the 'Church on the Island', is a distinctive Baroque structure situated on an artificial island within a pond in Zwierzyniec, Poland. Built between 1741 and 1747, the church was commissioned by Tomasz Józef Zamoyski as a votive offering for his wife. The building features an octagonal floor plan topped with a prominent dome and lantern. Its interior is noted for its high-quality polychrome frescoes depicting the life of Saint John of Nepomuk, created by Łukasz Smuglewicz. The structure is accessible via a stone bridge that connects it to the mainland park area. It serves as a focal point of the Roztocze region's cultural landscape. The church survived World War II with minimal damage, preserving its original 18th-century architectural integrity.
The wooden footbridge looking toward the main entrance with the water reflection in the foreground.
Walk the perimeter of the pond to see the reflection of the church in the water, which provides a better perspective than looking from the bridge alone.
Visit during the shoulder seasons to avoid the crowds that frequent the popular Roztocze hiking trails nearby.
Do not attempt to walk on the grassy banks surrounding the water, as they are protected habitats.
The interior is occasionally closed for private ceremonies or local parish events; external access is available year-round.
Maintain silence as it is an active place of worship; modest attire covering shoulders and knees is expected.
