Immaculate Conception church in Wigry, Parish church in Wigry, Poland.

The Immaculate Conception Church in Wigry was built to a design by Pietro Putini between 1694 and 1745 as the centrepiece of the Camaldolese monastery complex. It is a brick, plastered church on a Latin cross plan, 56 m long and 30 m wide, with a 17.5 m vault. A single nave with an elongated chancel is flanked by two square, two-storey towers topped with slender Baroque helms, and the west facade follows the modest Capuchin model of the Warsaw Capuchin church on Miodowa Street.

The Camaldolese received the island from King John II Casimir in 1667; after a fire destroyed their first wooden church in 1671, they began the present masonry complex in 1694, completed in 1745 to a design by Pietro Putini. In 1800 the Prussian government moved the monks to Warsaw and the church became cathedral of the new Wigry diocese; in 1818 the see moved to Sejny and the church became parochial. It was badly damaged in both world wars and rebuilt by 1966.

The main altar's openwork form traces the letter M, a reference to the Camaldolese devotion to the Virgin Mary. In the Chapel of St. Casimir, wooden figures of Kings John II Casimir and Władysław IV stand beside the gilded altar. The papal kneeler in the adoration chapel marks John Paul II's June 9, 1999 visit.

Access to the church requires climbing one of the two terraces with steps and retaining walls that form the entry approach. Visiting during services or checking opening hours ahead of time ensures you can see the interior comfortably.

The main altar, made of wood between 1720 and 1740, was destroyed in World War I and rebuilt in 1962 from original fragments. Its openwork carving forms the letter M, marking the Camaldolese devotion to the Mother of God. The central painting of the Immaculate Conception is by Wiktor Winikajtis, a Wigry guide, flanked by 18th-century figures of St Romuald and St Benedict.