If you're paying attention, you might notice that in addition to the Remuh and Old Synagogues, there's also a third synagogue on ulica Szeroka: that's the Popper Synagogue, tucked behind a gated courtyard and nestled between the street's Jewish restaurants. Built in 1620 by wealthy Jewish merchant Wolf Popper, the building was devastated during WWII such that none of its interiors survived; in fact little is known of them. Converted into a cultural centre (Dom Kultury) during the PRL era, the synagogue was only recently returned to the hands of the Jewish community and is now under the stewardship of Austeria - a publishing house and bookshop specialising in Judaica (literature, history and guide books in a number of languages). A colourful Jewish-themed mural can be found in the courtyard here, and upstairs is a small gallery space where workshops occassionally take place.