Old New synagogue, the synagogue of rabbi Jehuda Low, the oldest still serving synagogue in Europe and probably also all around the world.

Next option can be Spanish synagogue, one of the most beautiful synagogues in Europe. This Prague synagogue is also sometimes used as celebration place.

You can also use Jerusalemska synagogue, called Jubilee synagogue. It is very nice synagogue, but not in the Jewish quarter. The location is close to Vaclav square, about 15 minutes walk to the Jewish Prague city.

One more possibility is to use the High synagogue, "Hoch shul", which is located in the building of Prague Jewish community and is used for special occasions only.