The Izaak Synagogue or Isaac Synagogue, formally known as the Isaak Jakubowicz Synagogue, is a Prayerhouse built in 1644 in the historic Kazimierz District of Kraków, Poland. The synagogue is named for its donor, Izaak Jakubowicz (d. 1673), also called Isaac the Rich, a banker to King Władysław IV (...) (from Wikipedia)