Einwilligung zur Nutzung.

On the occasion of the redesign of the museum and archive buildings, urban archaeology excavations were carried out at the museum site between 1985 and 1991. Because the courtyard had remained vacant since the town fire of 1706, traces of the medieval town could be found there.

A trench running at an oblique angle, two drainage channels, and a large, also obliquely aligned sandstone foundation were discovered on the eastern side of the courtyard. It can be assumed that remains of the town wall and moat have been preserved here.

In the north-west section of the courtyard, a strip of foundation emerged that follows the same oblique angle as the medieval remains of a cellar located under the Altstädter Rathaus ('Old Town Hall'). It is probably part of the foundations of the Zum weißen Engel ('The White Angel') inn, which was destroyed during the Thirty Years' War and rebuilt after 1648.

Further east, the remains of a brick-built chimney and a cellar-like, subterranean sandstone structure filled with ash were found. The finds suggest that these belonged to a business working with fire. As suggested by urban archaeologists, this workshop may have been the Erlangen Mint of 1621/22.