The church of Corpus Christi was built in the place of the former settlement of Piaski, where, according to legend, the sacramental bread stolen and desecrated by Jews were found. Shortly after these events a wooden chapel was built at the place where the sacramental bread was found, and the growing fame of this place made king Władysław Jagiełło founded in 1406 gothic church and the monastery of carmelites. The temple was important personally to king Władysław Jagiełło, who vowed before the Grunwald campaign that he will take a pilgrimage to that church, which he realized after the battle and in 1419, when he went from Pobiedziska to Poznań on foot.
The present form of the church and monastery gained after rebuilding from 1465-1470. In 1657 the monastery was burned by the Brandenburgers. Destruction was removed only in 1664, when the vault of the nave was rebuilt, baroque façade was added and plastered. At the turn of the seventeenth and eighteenth centuries in the extension of the southern nave, a stubby tower was erected, and in 1726 the Chapel of Our Lady of the Scapular was erected on the north side of the chancel. In 1826 the Prussian government dissoluted the monastery, and the abandoned site began to devastate. The church was repaired by the reformers in 1856. The new owners carried out a thorough renovation. At the same time the monastery buildings were taken over by the Prussian army, changing them into barracks, and then into prison. In 1899 thanks to archbishop Florian Stablewski, temple became a parish church for Wilda, Rybak and Piaski. During World War II the Germans changed the church to a warehouse destroying many of the monuments. During the fighting in 1945, part of the vault and two of the five chancel windows with tracery were destroyed. Renovation was carried out in 1946-1947.
The church is a hall structure. The three naves are separated by pointed arcades, supported by profiled pillars. The longitudinal chancel of the same height is adjacent to the nave and is an unusual solution in gothic architecture of Wielkopolska. The interiors are illuminated by gothic windows. In three of them, there are stone tracery from the 15th century preserved in the presbytery. Gothic portals are made of glazed, multicolored bricks. The chancel is covered with a gothic rib vault, decorated in the 17th century with a baroque ornament. In the aisles, original stellar vaults of the 15th century have been preserved, which also used to adorn the central nave. Great, very massive inter-nave pillars were erected on a square plan and provided with profiled bricks in the corners.
From the west to the temple adjacent monastery complex. These are buildings with four wings, surrounding a small courtyard in the middle. Built at the same time as the church, the monastery unfortunately lost its original style. Only the room covered with a late-gothic stellar vault, presumably the former refectory, survived.
Walczak M., Kościoły gotyckie w Polsce, Kraków 2015.
Website wikipedia.org, Kościół Bożego Ciała w Poznaniu.