The Stadthaus am Markt is the main feature of the DomRömer Quarter and forms the southern boundary. It borders directly on the southermost row of houses called Markt or Krönungsweg with the two famous reconstructions Goldene Waage and Rotes Haus. The Stadthaus am Markt will become an event venue and meeting point for all residents. But that is not all. It is built over the Archaeological Garden, providing not only protection but also housing a large and freely accessible exhibition area where these important historical remains are given a modern presentation.

The archaeological findings in the middle of Frankfurt were not discovered until the 1950s. Buildings had stood on the Archaeological Garden until the destruction of the old town in the Second World War. Historical maps show that in the Middle Ages, houses in the old town were built right up to the Cathedral. Typical Frankfurt – the Archaeological Garden is a prime example of how new buildings were built over old ones. The latest investigations during preparations for the construction of the Stadthaus have revealed that the remains of Carolingian walls were used as basements and foundations for Mediaeval houses in the old town, for example. It was not until the destruction of Frankfurt's old centre in the Second World War that archaeologists from the Archaeological Museum were able to investigate the site for historically significant findings.

And what did they find? Evidence of Frankfurt's earliest settlements. Three cultural layers meet in the Archaeological Garden: the Roman period, the Carolingian period and the High Middle Ages.

Incidentally, the Archaeological Garden was not developed as an open-air archaeological museum until 1972/73 when the underground garage and the former Technical Town Hall were built. Since then the remains have suffered from the effects of the weather and the environment. It was therefore decided to build the Stadthaus over the remains, both to protect them and to make them more attractive and interesting for residents and visitors. The new space can also be used for events, living, working and leisure activities.