Shlomo ben Avraham ibn Aderet was a medieval rabbi, halakhist, and Talmudist. He is widely known as the Rashba, the Hebrew acronym of his title and name: Rabbi Shlomo ben Avraham.
Moses ben Nachman, commonly known as Nachmanides, and also referred to by the acronym Ramban and by the contemporary nickname Bonastruc ça Porta, was a leading medieval Jewish scholar, Spanish rabbi,
Shlomo ibn Aderet
…as El Rab d'España ("The Rabbi of Spain"). He served as rabbi of the Main Synagogue of Barcelona for 50 years. He died in 1310. Aderet's teachers were Nahmanides and Yonah Gerondi. He was a master in the study of the Talmud and was not opposed to the Kabbala. Aderet was very active as a rabbi and as an author…
21st-century artistic depiction of Nachmanides in Acre
Nachmanides's letter to his son displayed on the Ramban synagogue in Jerusalem