Midrash HaGadol or The Great Midrash (Hebrew: מדרש הגדול) is an anonymous late (14th century) compilation of aggadic midrashim on the Pentateuch taken from the two Talmuds and earlier Midrashim of Yemenite provenance. In addition, it borrows quotations from the Targums, and Maimonides and Kabbalistic writings (Oesterley & Box 1920), and in this aspect is unique among the various midrashic collections. This important work—the largest of the midrashic collections—came to popular attention only relatively recently (late 19th century) through the efforts of Jacob Saphir, Solomon Schecter, and David Zvi Hoffman. In addition to containing midrashic material that is not found elsewhere, such as the Mekhilta of Rabbi Shimon bar Yochai, the Midrash HaGadol contains what are considered to be more correct versions of previously known Talmudic and Midrashic passages.
The existence of the Midrash HaGadol was first brought to the attention of Jewish scholarship by Jacob Sapir, who in his Even Sapir (1866) reports seeing a manuscript of the work in the possession of the Chief Rabbi of Yemen (Fish 1957). His remarks about the "discovery" are reproduced in Fish (1940), where he describes a work on the entire Pentateuch containing "twice as much as our Midrash Rabbah". (It is worth noting that while this collection was new to European Jewry, it was probably well known to the Jews of Yemen.) The first manuscript was brought from Yemen to Jerusalem and then to Berlin in 1878 by a certain Mr. Shapira, and this Midrash subsequently became the subject of much scholarly attention. There are currently approximately two hundred manuscripts of this work residing in various public and private Hebraica collections, according to the catalog of the Institute of Microfilmed Hebrew Manuscripts.