St. Martini, Church building in Stolberg, Germany

St. Martini is a Gothic church in Stolberg whose lower west tower floors survive from a Romanesque building of the first half of the 12th century. Its steep saddle roof with two rows of dormer windows dominates the townscape. The choir, begun in 1485, is flanked by two-storey annexes with timber-framed gables, and a three-stepped pointed portal of red sandstone opens in the south wall.

The lower storeys of the west tower survive from a Romanesque church of the first half of the 12th century. In the second half of the 13th century a flat-roofed basilica was built, shifted northeast for lack of space. The choir, crypt-like substructure and southern sacristy were begun in 1485 and consecrated in 1490 by Berthold von Henneberg, Archbishop of Mainz; the nave roof frame is dated 1496. Thomas Müntzer was baptised here and later preached in the church.

St. Martini is the baptismal church of Thomas Müntzer, who was later one of its preachers; the 1885 choir windows show Martin Luther, Tylman Plathner and Johannes Spangenberg. Since its re-consecration as a Kulturkirche on 8 June 2022, services are joined by non-church events, including those planned for the 2025 Peasants' War and Thomas Müntzer anniversary.

The church stands on a slope, so buttresses reinforce its south and east walls. The south portal, made of red sandstone, is reached by a short flight of stone steps. Since 2022 the building has served as a cultural church, hosting concerts and events alongside services.

The church is the baptismal church of Thomas Müntzer, who was later one of its preachers. The font he was baptised at, dated 1599, is a Late Renaissance work: its hexagonal basin rests on baluster-shaped corner columns and a central foot framed by mask heads, and three of its panels show music-making angels.