The cube-shaped prayer hall representing architecture of the Italian-Polish Renaissance was the main part of new synagogue.
The walls were up to 1.5 m thick.
There were two additional sections used by women and for the Jewish school or Yeshiva.
A defensive tower containing the arsenal with loopholes was built on the southern corner of the prayer hall according to the wishes the king. The tower formed part of city walls, allowing the synagogue to contribute to defences in addition to its religious and educational roles