Samuel David Luzzatto is an Italian Jewish scholar, poet, and a member of the Wissenschaft des Judentums movement.
He is also known by his Hebrew acronym, Shadal.
Luzzatto was born at Trieste on 22 August 1800; died at Padua on 30 September 1865.
While still a boy he enters the Talmud Torah of his native city, where besides Talmud, in which he is taught by Abraham Eliezer ha-Levi, chief rabbi of Trieste and a distinguished pilpulist, he studies ancient and modern languages and science under Mordechai de Cologna, Leon Vita Saraval, and Raphael Baruch Segré, whose son-in-law he later becomes.
He studies the Hebrew language also at home, with his father, who, though a turner by trade, is an eminent Talmudist.