The archaeological excavations on this square, lasting nearly three years - which in the summer of 1995 began as a routine measure, on the 3.000 square metres of the former medieval Jewish quarters destroyed in 1519 - resulted in absolutely unexpected findings: not only were the foundations of the synagogue unearthed, but also the mostly well-preserved vaulted basements of residential buildings, vaulted in Romanesque or Gothic style. In addition, a little bronze god-like statue dating back to the times of the Roman fortress Castra Regina was found, followed by a rare depiction of the High Priest Aaron from the 15th century in the form of a bronze figure, and a hidden treasure of 624 gold coins that had been buried in two clay pots in one of the basements around the year 1388. Last, but not least, the signet ring of Regensburg's Jewish community was found bearing the symbols of a star and crescent moon.

A part of these findings can be seen today in three of these basements that have been converted into a museum and are accessible by means of a staircase on the square built in an unmistakably contemporary design. A number of things can be seen and studied in the "document Neupfarrplatz" below the square:  first, the basements themselves, second, various foundations showing walls and corners of Roman army barracks, third, a major section of the ring-shaped air-raid shelter which the Nazi regime had installed here shortly before WWII. There is also an auditorium in which one can watch a video animation intended to make the everyday life of Jewish citizens come alive in medieval Regensburg. In the pavement of the square, one finds a window made of shatter-proof glass which brings daylight into the basement with the auditorium and spans an imaginary path between yesterday and today.