The church in Wigry was richly equipped. Until 1915, there were 10 altars in the temple. Seven were restored after war damage. The two-story main altar of Immaculate Conception of the Blessed Virgin Mary, made of gilded wood. The openwork of the first floor, made of plant twigs and woodcarving ribbons, forms a capital letter M, symbolizing the name of Maria (Mother of God); they frame the image of the Immaculate Conception of the Blessed Virgin Mary. The altar decoration is complemented by figures of St. Romuald and St. Benedict. The side altars in the chapels facing the nave from the south are dedicated to St. Romuald, Christmas and St. Casimir; in the chapels facing the nave from the north: St. Peter, St. Michael the Archangel and St. Benedict. Contemporary paintings hang in all the altars, the original ones were destroyed during World War I and II. Most of the furnishings are baroque except for the choir and the altar of St. Benedict, which are made in the classicist style.
Dr. Dariusz Maciej Ambrosiewicz