Complex sentence: The design is inspired by the seashells on the shores of the Greek city of Thessaloniki, which is the hometown of the wealthy Recanati family, who donated the money for the synagogue.
Split into simpler sentences: The design is inspired by the seashells on the shores of the Greek city of Thessaloniki, which is the hometown of the wealthy Recanati family. It was the Recanati family who donated the money for the synagogue.