Rabbi Moshe ben Nachman (1195-1270), known as RaMBaN or Nachmanides, was one of the greatest medieval Jewish scholars.

He was a rabbi and a physician who wrote commentaries to the greater part of the Talmud and Pentateuch. In his commentaries, he often brought Haggadic and Kabalistic interpretations to the plain text.

Nachmanides tried to save European Jews of his time from a schism over the issue of the great philosopher Maimonides (RAMBAM). Nachmanides had duel feelings toward the Maimonides; on the one hand he had reverence for the work of Maimonides, and on the other hand he disagreed with Maimonides' rationalizing of the Scriptures, his rejection of miracles, and his enumeration of the 613 Commandments. Nachmanides tried to reconcile the supporters and opponents of Maimonides. After King Louis of France burnt all copies of the Talmud in Paris, the opponents of Maimonides decided to back down from this matter and all matters that cause division among the Jewish People.

After a series of public debates in which Nachmanides defended Jewish beliefs, he was banished from Spain on a charge of blasphemy. He traveled to Palestine, and settled in Acre. He spent the last years of his life trying to educate the Palestinian Jewish community.