In the course of our shiur, I referenced what Ramban said in his debate in 1263, regarding midrashim, and the obligation to believe in them. Here is a link to The Disputation, the dramatization of Ramban's debate with Pablo Christiani, for which Ramban was awarded with expulsion from Spain
Ramban’s successful life as the chief rabbi of Catalonia and as a physician was destroyed by the Disputation at Barcelona, which forced him to leave his family and his country. In 1263 he was ordered by King James to participate in a religious debate with Pablo Christiani, a Jewish apostate.
Christiani assured the king that he could prove the messianic claims of Jesus from the Talmud and other rabbinical writings, and he thought that the fear of the Christian dignitaries would impede Nachmanides’ willingness to speak freely.
Ramban complied with the order of the king, and for four days he debated with Christiani in the presence of the king, the court and many ecclesiastical dignitaries.
Ramban won and published an account of the proceedings. But the Dominicans showed the king several passages that were deemed to be blasphemies against Christianity, and Nachmanides was banished from Catalonia.
After wandering three years in Castile and southern France, he moved to Palestine in 1267, settling in Acco until his death in 1270.