Rabbi Judah ha-Nasi, often referred to simply as Rabbi or by the title 'Nasi', was a prominent Jewish scholar and leader in the late 2nd to early 3rd century CE. He is best known for his role in compiling and editing the Mishnah, the foundational text of Rabbinic Judaism, which helped shape Jewish law and practice during a critical period of transition for the Jewish community after the destruction of the Second Temple.