A memorial plaque is located at the site of the former synagogue, at Šebetićeva Street 5.

The Karlovac Synagogue was built under Filip Rajner, president of the Jewish community Karlovac, who liked to call himself "Croatian nationalist of Moses religion".

Completed in 1870 in the Renaissance Revival and Gothic Revival styles with five rosette on the façade as a symbol of the Pentateuch, the synagogue faces east, towards Eretz Yisrael.

During World War II, the synagogue was turned into a warehouse.

After the war, around 1960, the Karlovac Synagogue was demolished by the regime of SFR Yugoslavia.