The quadrilater is a building from the early eighteenth century, in which there were stalls city. It was built in a square in the middle of a large courtyard, and you can ride In it through one of two gates, which are crowned by the characteristic peaks. The building was initially a single-storey, but in the early nineteenth century, there was built additional floor and outbuildings. From the courtyard you can see many mysterious galleries, nooks. According to local tradition, on the courtyard of Quadrilater took place duel of Bohun and Volodyovski described by Henryk Sienkiewicz in the novel “With Fire and Sword”.