Marien Church

St. Mary's Church is a five-aisled brick basilica. The side aisles have stepped gables. The spire is covered with copper. The base of the tower inside the church is the only preserved part of the original church. It is accessible. Its walls are about three meters thick.

The walls of the High Choir are white with black ribs. The carved wooden altar stands in the High Choir. It is eight meters high and over six meters wide, making it the largest carved altar in the Altmark. With 30 relief figures and 22 sculptures in 31 fields, it depicts scenes from the lives of Mary and Jesus, some of which were created after copper engravings by Martin Schongauer. Part of the choir stalls, created around 1360, is preserved. Also from this time is a Christ window, located in the choir. Another stained-glass window dates from the 16th century. In the choir are a richly decorated wooden lectern from the 13th century and an eagle lectern from the 15th century, a Levite's seat from the 14th century, and a Margrave's seat from the 16th century, like the Levite's seat a triple seat. At the entrance to the High Choir is a triumphal cross group in its original arrangement. The rest of the church interior is also painted white, but has red ribs in the main nave and red-black striped ribs in the side aisles. In the nave are life-sized stone figures on the impost platforms of the former Romanesque basilica. Remains of old wall paintings are present. The Renaissance baptismal font in the southern side aisle includes a baldachin attached to the vault and a grille that surrounds the baptismal font. The baptismal font itself is heated.

Above the bridal portal is a 19th-century stained-glass window depicting the Annunciation of the birth of Jesus by the Archangel Gabriel. The peal consists of six bells. The youngest bell is called "Shalom". The furnishings of St. Mary's Church include a silver-gilt Gothic communion chalice from the mid-15th century and a silver-gilt host vessel from the early 14th century.

In the Baroque organ case by Joachim Wagner from 1749 is an instrument by the organ building company P. Furtwängler & Hammer from 1913. The organ has 61 stops and three extensions on three manuals and pedal. The actions are electropneumatic. The instrument was last extensively restored in 2005 by Christian Scheffler (organ builder).

Services are held in the church weekly and on holidays. In addition, there are exhibitions on religious themes. An annual concert series consists of concerts for solo organ, with solo vocals, or with other instruments.

St. Mary's Church is located on a square in Salzwedel's Old Town, partly lined with 150 to 300-year-old lime trees. Historic half-timbered houses surround the square. The streets around St. Mary's Church are paved with cobblestones. South of the church is the Kluhs, a former tithe barn of the parish, which has been used as a church café and community event venue since its renovation. In Salzwedel's Old Town, there are two other medieval churches: St. Lawrence's Church (Lorenzkirche) and the Mönchskirche.