KKJ continues to hold services on Shabbat and the High Holidays, while a museum housed in the upstairs women’s gallery has been open to the public every Sunday since 1997. It features exhibits related to both Romaniotes and Greek Sephardim, the latter rooted in Thessaloniki after 1492 (then-Salonica, Ottoman Empire) due to the Alhambra Decree expelling them from the Crowns of Castille and Aragon. The wealth and numerical dominance of the Sephardim consequently overshadowed and subsumed the historical preeminence of the Romaniotes.