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Map swisstopo	Map by Google Maps

The largest late Gothic building in Muttenz sets an important accent at the entrance to Burggasse. The property is first mentioned in 1528. The present building was erected between 1600 and 1620. With the arched entrance and the corner pillar at the corner of the building, the façade indicates a late Gothic style. The initials JHR point to the owner Johannes Rösch. The house probably became an inn at that time, named "zum Schlüssel", and is therefore the second oldest inn in Muttenz after the "Rössli". During the turmoil of separation of the two Basle between 1830 and 1833, Johannes Mesmer-Ramstein, the owner of the "Schlüssel", was one of the leading figures and was also elected to the provisional government. In 1848 he granted refuge to the leaders of the Baden Revolution who had fled to the "Schlüssel". The property was acquired by the municipality in 1979 and by the citizens' community in 1983. As early as 1950, the barn/stables part had been replaced by a three-storey residential building. During the conversion by the citizens' community, care was taken to ensure that the interior was not completely renewed. The community has thus saved an important part of the late medieval building fabric.