Joseph ben Solomon Ṭaiṭazaḳ (Hebrew: יוסף בן שלמה טאיטאצק), also referred to by the acronym MahaRITaTS, was a Talmudic authority and Kabbalist who lived at Salonica in the 15th and 16th centuries.
With his father and brother Judah ben Solomon Taitazak, he moved in 1492 from Spain, his native land, to Salonica, where he became a rabbi.
1550 CE) Shoshan Yesod Olam (The Rose, Foundation of the Universe), Rabbi Eljah Baal Shem's Toledot Adam (Generation of Adam), and Rabbi Isaiah Horowitz's (1560-1630 CE) Sh'nei Luchot HaB'rit (Two Tablets of the Covenant) discuss the magic square in relation to the mysteries of creation.
Eliyahu de Vidas related that with the exception of Sabbath nights, Joseph for forty years never slept in a bed, but on a box, with his feet on the ground.
[1] With such a disposition to asceticism and mysticism, it was but natural that Joseph should become enthralled by the messianic vagaries of Solomon Molcho, whom he supported while preaching at Salonica in 1529.