St. Nikolai, Medieval church in Zschortau, Rackwitz, Germany.

St. Nikolai is a late Gothic hall church in Zschortau, part of Rackwitz, with a Romanesque west tower from the 12th or 13th century. The nave and choir were enlarged around 1500, and a two-storey sacristy was added on the north side of the choir. The exterior is rubble masonry with brick sections, large two-light tracery windows and buttresses; inside, a net vault with painted ribs and remains of flame and ray paintings spans the ceiling.

The church dates from the 12th/13th century, when the Romanesque west tower with its rectangular ground plan was built. Around 1500 the nave and choir were enlarged and a two-storey sacristy added to the north side of the choir. The building was restored in 1975.

The church is also called St. Nikolai, after Nicholas of Myra, who appears with Gertrud in the shrine of the 1517 carved altar. The organ, built by Johann Scheibe in 1745–46, was tested by Johann Sebastian Bach, who certified it as "tüchtig, fleißig und wohl erbauet"; the original certificate is kept in the British Museum.

The church is normally open for services; the interior with the Scheibe organ and the 1517 carved altar is best seen by asking the parish in advance about viewing times. The building stands in Zschortau, part of Rackwitz, and the entrance is through the dark arched doorway at the base of the west tower.

The organ, built by Johann Scheibe in 1745–46, was inspected by Johann Sebastian Bach in 1746, who judged it "tüchtig, fleißig und wohl erbauet". The original certificate of inspection is held at the British Museum in London.