The Old New Synagogue (; ), also called the Altneuschul, situated in Josefov, Prague, is Europe's oldest active synagogue. It is also the oldest surviving medieval synagogue of twin-nave design. Completed in 1270 in gothic style, it was one of Prague's first gothic buildings. A still older Prague synagogue, known as the Old Synagogue, was demolished in 1867 and replaced by the Spanish Synagogue. Etymology The synagogue was originally called the New or Great Synagogue and later, when newer synagogues were built in the 16th century, it became known as the Old-New Synagogue. Another explanation derives the name from the Hebrew עַל תְּנַאי (al tnay), which means "on condition" and sounds identical to the Yiddish "alt-nay," or old-new. According to legend angels have brought stones from the Temple in Jerusalem to build the Synagogue in Prague—"on condition" that they are to be returned, when the Messiah comes, i.e., when the Temple in Jerusalem is rebuilt and the stones are needed. Interior Nine steps lead from the street into a vestibule, from which a door opens into a double-nave with six vaulted bays. This double-nave system was most likely adapted from plans of monasteries and chapels by the synagogue's Christian architects. The molding on the tympanum of the synagogue’s entryway has a design that incorporates twelve vines and twelve bunches of grapes, said to represent twelve tribes of Israel. Two large pillars aligned east to west in the middle of the room each support the interior corner of four bays. The bays have two narrow Gothic windows on the sides, for a total of twelve, again representing the twelve tribes. The narrow windows are probably responsible for many older descriptions of the building as being dark; it is now brightly lit with several electric chandeliers. The vaulting on the six bays has five ribs instead of the typical four or six. It has been suggested that this was an attempt to avoid associations with the Christian cross. Many scholars dispute this theory, pointing to synagogues that have quadripartite ribs, and Christian buildings that have the unusual five rib design. The bimah from which Torah scrolls are read is located between the two pillars. The base of the bimah repeats the twelve vine motif found on the tympanum. The Aron Kodesh where the Torah scrolls are stored is located in the middle of the customary eastern wall. There are five steps leading