The Church of All Saints in Wąsosze, built at the beginning of the 17th century, is a brick temple situated in a picturesque location by Lake Wąsosko-Mikorzyńskie, in the Ślesin municipality, within the Włocławek diocese. The church was consecrated in 1602 and over the centuries, it has undergone numerous transformations, including reconstruction after a fire in 1849. In the 20th century, the church remained undamaged by wartime activities, and thanks to the efforts of parish priest Rev. Dr. Wiktor Hołtyn, numerous renovations and restorations were carried out in the 1990s and in 2002, significantly enhancing the building's aesthetics. The church's facade, distinguished by its vibrant colors, and cross motifs have become integral parts of the region's architectural landscape. The interior is adorned with a 19th-century Baroque main altar, polychrome paintings, and side altars, which stand out for their consistent style and depictions of saints. Interestingly, the church was restored on the occasion of its 400th consecration anniversary, with polychrome work carried out by renowned artists from Gniezno and Poznań. The church also serves as a memorial site—commemorative plaques, epitaphs, and a monument to St. John Paul II, funded by the parishioners, are displayed on its walls. Among the church's historic artifacts are the front doors from 1913, as well as grottos and a cross commemorating the Holy Missions that took place in 2007. The Mierzyński family, owners of Wąsosze for many years, left their mark on the local community and the Wąsosze cemetery. The church in Wąsosze not only serves a religious function but also represents a significant cultural and historical element of the region, bearing witness to numerous events and traditions.