St. Anna's Chapel in Lontzen-Busch is a Gothic gem from the 15th century. The original fittings and furnishings include the Flemish altar and the predella – the step on which the altar stands –, which also dates from the 15th century. On it, Christ and the apostles are depicted as half figures. The middle group on the altar depicts the crucifixion, whilst the sidepieces show scenes of the scourging, Jesus carrying the cross, the descent from the cross and the resurrection. The chapel is part of the network of open churches.