In the old town, Klostergasse was a lane where the well-to-do part of the population lived - merchants and vintners, mayors, artisans and artists. Some of the town houses dated back to the first half of the 15th century. Heilbronn reformer Johann Lachmann lived in number 39 around 1529. 300 years later, Adolf Cluss was born in the very same house.
Diagonally opposite was one of the parish houses, also known as the Senior house or deanery. In the early 19th century the Catholic parish office and a small Catholic elementary school moved to this lane.