Ostia Synagogue

The Ostia Synagogue is an ancient former Jewish synagogue and archaeological site, located in ancient Ostia, the seaport of Imperial Rome, in modern-day Lazio, in Italy. It is one of the oldest synagogues in the world, the oldest synagogue in Europe and the oldest mainstream Jewish synagogue yet uncovered outside the Land of Israel. The synagogue building dates from the reign of Claudius and continued in use as a synagogue into the 5th century AD.

Source: Wikipedia