Main Synagogue of Barcelona
... that the Main Synagogue of Barcelona may be the oldest synagogue building still standing in Europe?
... that the <b id="mwEN0"><a class="mw-redirect" href="./Main_Synagogue_of_Barcelona" id="mwEN4" rel="mw:WikiLink" title="Main Synagogue of Barcelona">Main Synagogue of Barcelona</a></b> may be the oldest <a href="./Synagogue" id="mwEN8" rel="mw:WikiLink" title="Synagogue">synagogue</a> building still standing in Europe?