Saint Gertrude Chapel, Religious building in Uelzen, Germany.

Saint Gertrude Chapel is a single-nave brick building under a steep pitched roof of orange-red clay tiles, on Gudesstraße outside the Gudestor. A small square roof turret with dark panels, a clock face and a weathervane sits on the ridge; the brick walls have a pointed-arch window and a recessed arched doorway. Its six glass windows (1951) and three-winged altarpiece (1953) were made by Bielefeld artist Renate Strasser.

Hans Holsche and his wife funded the chapel's construction between 1511 and 1513; the Gertrudenstiftung they established still holds patronage. It served as a rest house for merchants who arrived after Uelzen's gates closed at sunset. In 1945 artillery hits destroyed the roof, and architect Karl Schlockermann led the rebuild, completed with a new roof turret by February 1949.

The chapel is named after Saint Gertrude of Nivelles, abbess of a Belgian monastery and, in Catholic tradition, protector of wanderers and travellers. It is used for services by the Lutheran St. Petri congregation and the Evangelical Reformed Church, while the Gertrudenstiftung founded by Hans Holsche still holds the patronage.

The chapel stands on Gudesstraße, just outside the former Gudestor gate, north of Uelzen's old town. It is kept locked during the day, as it was historically, and opens only for services held by the St. Petri Lutheran parish and the Evangelical Reformed congregation. Visitors should check service times before coming.

The chapel's six stained-glass windows, made in 1951 by Bielefeld artist Renate Strasser, were each donated by Uelzen families in memory of relatives killed in the war. Their motifs include the Three Kings, the Good Samaritan, the Flight into Egypt and the Emmaus disciples.