Aliyah is the immigration of Jews from the diaspora to, historically, the geographical Land of Israel or the Palestine region, which is today chiefly represented by the State of Israel. Traditionally described as "the act of going up", moving to the Land of Israel or "making aliyah" is one of the most basic tenets of Zionism. The opposite action — emigration by Jews from the Land of Israel — is referred to in the Hebrew language as yerida. The Law of Return that was passed by the Israeli parliament in 1950 gives all diaspora Jews, as well as their children and grandchildren, the right to relocate to Israel and acquire Israeli citizenship on the basis of connecting to their Jewish identity.

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, Catalan rabbi, philosopher, physician, kabbalist, and biblical commentator. He was raised, studied, and lived for most of his life in Girona, Catalonia. He is also considered to be an important figure in the re-establishment of the Jewish community in Jerusalem following its destruction by the Crusaders in 1099.