The construction of a brick church on the site of an earlier wooden one, began in the second half of the 14th century. The church tower was erected at the end of the 14th century, and then it was raised in the 15th century and around 1530. From the end of the 14th century, side chapels and a sacristy come from. The church was repeatedly renovated after the fires of 1400, 1442 and 1497. During the reconstruction carried out after the last fire, the nave was transformed from a basilica into a hall. In 1698, the building burnt down again, and during the reconstruction it was transformed into a Baroque style. In the years 1870-1876 a thorough restoration of the church was carried out, and in the years 1891-1896, a neo-Gothic presbytery and porch from the north and south were added to its nave.
The Church of St. Peter and Paul was built as an orientated brick building, situated in the southern part of the town, close to the defensive walls. Its nave finally got the form of a three-aisle, five-bay hall, characteristic for the region of Warmia, without the chancel separated externally, built on a rectangular plan with dimensions of 70 x 24 meters. On the southern side, a two-story sacristy was attached to it, and on the western side, a five-story tower, decorated from the outside with pointed blendes, of which those on the two lower floors received roller moulding. From the outside, the nave was clasped with stepped buttresses positioned diagonally in the corners. The interior of the church was covered with stellar vaults supported by eight pillars and four wall half-pillars. Among the oldest and most valuable monuments of the church are: the reliquary of St. Ida from the year 1400, Gothic chalices from the fifteenth century and a pax from the thirteenth century.
Kościoły i kaplice archidiecezji warmińskiej, tom 1, red. B.Magdziarz, Olsztyn 1999.
Rzempołuch A., Kościoły na Warmii, Mazurach i Powiślu, Olsztyn 1991.
Rzempołuch A., Przewodnik po zabytkach sztuki dawnych Prus Wschodnich, Olsztyn 1992.
Website leksykonkultury.ceik.eu, Kościół pw. św. Piotra i Pawła w Lidzbarku Warmińskim.