The Church of the Exaltation of the Holy Cross in Olszyny is a Roman Catholic temple built in 1900 according to the design of Łukasz Filipiak. It replaced an earlier, 16th-century church that was consecrated in 1580. The current wooden structure is characterized by its Neo-Gothic style and log construction. It is oriented and consists of a three-sided closed chancel, a sacristy, a wider nave, a porch, and a spacious vestibule. The entire building is covered with a single-ridge sheet metal roof, topped with a belfry featuring an onion-shaped spire. The interior of the church is divided into three sections by six pillars with arches, while the chancel and the main nave have a false barrel vault. The figurative and ornamental polychrome, created in 1908 by Stanisław Gucwa, draws inspiration from the decor of Gothic masonry churches. The furnishings include a main altar, two side altars from the years 1902–1904, a Neo-Gothic baptismal font from 1910, an organ from 1901, and a valuable painting of Christ falling under the cross from the second half of the 16th century. Next to the church stands a freestanding arcaded bell tower from 1908, housing four bells—one from 1928 and the other three from 1970, crafted in the Felczyński workshop in Przemyśl. The church in Olszyny not only serves a religious function but also represents an important element of local culture and history, blending the region's artistic and architectural traditions.