Mathew 5:8
God blesses those whose hearts are pure, for they will see God.

This is one of the few remains of a 1st Century synagogue that has been found by archaeologist.  Gamla was destroyed by the Romans during the Jewish revolt of 66 - 70 A.D. and was never rebuilt.  There can be no question that this synagogue was in use during the 1st Century A.D. (the time of Jesus).
Bible Land Studies
Providing a Hebraic and Historical Prospective of the Bible
1st Century Synagogue - Gamla
Archive - Lessons From the Olive Tree