RID - R. Yeshayah ben R. Mali of Trani,

From Bar Ilan Responsa Project

RID

R. Yeshayah ben R. Mali of Trani, one of the foremost Torah scholars in Italy, was born in Trani, Italy, ca. 1180. He is also known as R. Yeshaya di-Trani Ha-Zaken ("the Elder") or Ha-Rishon ("the first"), or by the acronym RiD, to distinguish him from R. Yeshaya di-Trani Ha-Sheni ("the second") or Ha-Acharon ("the later"), also known as RiAZ. R. Yeshayah studied in the yeshiva of R. Simcha of Speyer. He maintained close contact with the leading Torah scholars of Germany, and his responsa are quoted in Or Zarua, by his contemporary R. Yitzchak ben R. Moshe of Vienna. Together with R. Eliezer ben R. Shmuel of Verona, he founded a yeshiva in Trani, where the Tosafist methodology of Talmud study was employed. R. Yeshayah died ca. 1260.

 R. Yeshayah authored numerous works. These include Piskei Rid (published by Yad Ha-Rav Herzog in numerous volumes), a collection of halachic decisions arranged according to the order of the Talmud, hundreds of which are cited in the Beit Yosef and other poskim; Sefer Ha-Machria, first published in Livorno, 1779, which includes discussions of various complex halachic issues; responsa; a commentary on the Torah, and piyyutim.

 His best known work is Tosefot Rid, on 19 tractates of the Talmud. (The Tosefot Rid on tractates Yevamot, Ketubot, and Gittin are really Piskei Rid.) R. Yeshayah frequently quotes Rashi, referring to him as Ha-Moreh ("the teacher"). Moreover, many of the anonymous comments quoted by R. Yeshayah were taken from Rashi.