Old Town Square - the official name of this street Old Town - is one of the oldest historic and major Olsztyn Old Town squares, which is located in the middle of Old Town. At the Old Town are houses, most of which were destroyed during World War II. Today they are in shops, restaurants and "Awangarda" cinema. In the middle: Old City Hall, which today houses the Provincial Public Library, which also has undergone complete renovation of the Market and the surrounding Old Town Hall.
Translation of Polish wiki page: http://pl.wikipedia.org/wiki/Rynek_Starego_Miasta_w_Olsztynie