Levi
"Levi, watched over you and your word and guarded our covenant. He teaches your percepts to Jacob and your law to Israel” – Deuteronomy 33
Levi and his descendants were to become the priests in charge of the Tabernacle and later the Temple in Jerusalem. This is the reason that Chagall has placed modern Jewish symbols in this window. Can you see the Star of David, the Tablets of the 10 commandments and the Sabbath candlesticks? The Star of David is one of the symbols on the flag of Israel.
