On the southern edge of Esslingen’s market square is the town church of St. Dionys, which was built in its present form in the 13th and 14th centuries. Before that, two other church buildings already stood on the same spot. The first was built as early as 777 and is considered to be one of the beginnings of the town of Esslingen am Neckar. Today’s basilica with its three naves and high choir shows the stylistic transition between the Romanesque and Gothic eras. Worth a visit are the beautiful medieval glass windows in the choir and the excavations under the town church, which can be admired on a guided tour of the town.