Johanneskirche

Johanneskirche is a Protestant church near the eastern gate of the former Roman fort, built using stones from that ancient installation. The building has a simple rectangular plan and functioned from its beginning as a religious gathering place for the community.

The building was constructed in the 9th century using materials from the Roman fort and ranks among the oldest religious structures in Württemberg. It shows how early Christians repurposed the remains of Roman sites for new functions.

The west wall displays Romanesque frescoes from the early 13th century depicting religious scenes. The southeastern side holds epitaphs that offer glimpses into the lives of Aalen's citizens around 1570.

The building sits easily accessible near Aalen's city center and is clearly visible from outside. The Protestant congregation uses this place regularly, so visitors can enter during services or by arrangement.

During renovation work in 1973, workers discovered a Roman dedication altar for Jupiter Dolichenus embedded in the church's foundation. This find reveals that religious rituals took place at this location long before Christianity arrived.