Johanneskirche, Gothic church in Erfurt, Germany

Johanneskirche is a demolished church in Erfurt's old town: only its tower, the Johannesturm, survives. The square tower is built of grey-brown stone blocks with lighter corner quoins and rises to a pointed spire with pinnacles. Its upper face carries a round clock with a blue-green dial below a small circular opening, with tall pointed windows lower down.

The Johanneskirche was first documented in 1131. The last church building, including the surviving tower, was erected between 1469 and 1486 in Gothic style, according to the Esperanto source to plans by architect Johann Gregorius. Worship ended with the Reformation in 1525; the building was later used as a military depot, including by French occupiers in 1811, and demolished between 1817 and 1819.

The church is gone, but its name lives on in Johannesstraße, Johannesplatz and Johannesvorstadt, all named after it. The surviving Johannesturm now serves the neighbouring Augustinerkloster as its bell tower, so the former parish church still rings for worship, though in another building.

Only the Johannesturm survives; the church itself was demolished in 1817–19, so there is no interior to visit. The tower stands on Johannesstraße in Erfurt's old town and serves the neighbouring Augustinerkloster as its bell tower. To its left are low-rise model apartment blocks from the 1980s, built to test modern GDR housing.

The tower's survival is owed to its new role: since the church was demolished in 1817–19, it has served as the bell tower of the neighbouring Augustinerkloster. The tower itself dates from the Gothic rebuilding of 1469–1486, and its clock face with a blue-green dial is a detail to spot.