Complex sentence: At the beginning of the 17th century a new synagogue, the Yochanan ben Zakai Synagogue, was built at the hands of immigrants who arrived after the expulsion from Spain.
Split into simpler sentences: At the beginning of the 17th century a new synagogue, the Yochanan ben Zakai Synagogue. The current builidng was constructed at the beginning of the 17th century by immigrants who arrived after the expulsion from Spain.