The exhibition presents the archaeological excavations which were conducted in the years 2005-2010. The archaeologists got as far as 5 meters below Cracow Main Market Square. Thanks to their work 11 000 exhibits were found. They are connected with door-to-door salt, lead and copper trade and ancient Cracow’s everyday life. All the exhibits with protected earth layers display the process of cultural layers earth formation. In the underground the viewers can also see remains of wooden cottages and burial mounds from 11th century. This archaeological sanctuary is utterly unique space in whole Europe. The museum has the area of 4 000 square meters.