The temple was erected in the years 1423-1428 at the site of the earlier wooden structure. Initially it was a building with only one nave and a narrower chancel. It was expanded at the turn of the 15th and 16th century by the addition of aisles and elevation of the tower. In the middle of the 16th century the tower was topped by a renaissance attic. In the years 1598-1602 the renaissance, funeral chapel of Gostomscy was added. In 1423 the church was raised to the dignity of the collegiate. From the end of the 15th century up to the Partitioning of Poland, in the area of the temple and adjacent necropolis, regular, local parliaments were held for the Poznań and Kalisz provinces. During the Sejmiks, senators debated inside the temple, deputies in the stands in front of the church, and the secretary in the chapel, separated from the irascible debaters by a metal grate.
The collegiate church is a basilica building, with narrower than the cemtral nave, a five-side ended chancel. On the north side is the sacristy, and from the south is a late eighteenth-century burial chapel. In the interior you can see original gothic vaults, stellar in aisles and rib in chancel.
Website regionwielkopolska.pl, Kościół pw. NMP Wniebowziętej w Środzie Wielkopolskiej.