Hava Tirosh-Samuelson, Between Worlds: The Life and Thought of Rabbi David Ben Judah Messer Leon, State University of New York Press, 1991
Italian rabbi, physician and writer David ben Judah Messer Leon (Venice, c. 1470 – Salonica, c. 1526) defended the value of secular disciplines and the Renaissance humanities as an important part of traditional Jewish studies.
He was educated at Naples in the school of his father, Judah Messer Leon, author of Libnat ha-Sappir, and received at the age of eighteen his rabbinical diploma from German and French Talmudic authorities. Soon afterward he went to Padua, where he studied under Judah Minz, who granted him a new rabbinical diploma. After further studies in Florence, he returned to Naples in 1492, where he practised as a physician and taught in his father’s academy. However, in 1495 the city fell to the French under Charles VIII, and he fled east to the Ottoman Empire to escape the violent pogroms that ensued, spending time in Istanbul before moving sometime between 1498 and 1504 to teach Torah in Salonica, at that time in a state of intellectual vibrancy due to the settlement there of many Sephardi exiles forced to leave after the expulsion of the Jews from Spain in 1492, Sicily in 1493, and Portugal in 1496.