The building on no. 3 related to the Stairs Tower is part of the first fortification belt in the 13th century.

The current exterior configuration is a „modernization” of the 19th century. The building annexed to the tower was a merchants’ house, the small wing leading to the tower dating since the end of the 19th century.

The Northern wall preserved a window framework since the Renaissance. The walls are fresco painted dating since the first half of the 16th century.