Inclined tower of Gau-Weinheim, Medieval fortified tower in Gau-Weinheim, Germany

The Inclined Tower of Gau-Weinheim is a square stone structure that originally functioned as a fortified cemetery building and was later converted into a bell tower. It contains bell mechanisms that ring multiple times throughout each day.

The square tower was a medieval defensive tower of the former cemetery fortification. The corner tower of the former church was rebuilt in 1749 as a bell tower and given a domed roof with a lantern. In 1991 it was restored for 96,278 DM, and the bells have rung again since 1 August 1991.

Locals call Gau-Weinheim "Rheinhessen's Pisa" because the tower leans more than the one in Pisa. Since 1 August 1991 the bells ring again at 11 a.m., 1 p.m. and 6 p.m. on weekdays, an old custom the village calls "Bürgerliches Läuten" (citizens' ringing).

The tower stands in the centre of Gau-Weinheim, in the Alzey-Worms district of Rhineland-Palatinate. Its bells ring at 11 a.m., 1 p.m. and 6 p.m. on weekdays, but not on Sundays or public holidays. The masonry was secured in 1991, so the lean can be viewed from the surrounding lanes.

Each of the tower's four sides leans at a different angle, a detail visitors rarely notice. In July 2022 a measurement gave 5.4277°, and on 11 September 2022 the Rekord-Institut für Deutschland named it the "most leaning tower in the world".