Old New synagogue
Old New synagogue, the synagogue of rabbi Jehuda Low, the oldest still serving synagogue in Europe and probably also all around the world.
Spanish synagogue
Next option can be
Spanish synagogue, one of the most beautiful synagogues in Europe. This Prague synagogue is also sometimes used as celebration place.
Jerusalemska synagogue
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.
High synagogue
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.