From 1918 to 1923, Goitein attended the Universities of Frankfurt and Berlin and studied Islamic history under Josef Horovitz. His Ph.D. thesis was on prayer in Islam. He also pursued
Jewish studies, and was a leader in the
Zionist youth movement. In 1923, he immigrated to Palestine, where he taught
Bible and Hebrew language at the
Reali School in Haifa. In 1927, he wrote a play called
Pulcellina about the
blood libel killings in
Blois in 1171. In 1928, he was appointed professor of Islamic History and Islamic Studies at the
Hebrew University of Jerusalem. He was founder of the School of Asian and African studies and of the Israel Oriental Society. In 1928, he began his research of the language, culture, and history of the
Jews of Yemen. In 1949, he did research in
Aden as Yemenite Jews gathered for their
evacuation to the nascent Jewish State. In 1938-1948, he served as a senior education officer in Mandatory Palestine—responsible for Jewish and Arab schools—and published books on methods of teaching the Bible and Hebrew. Goitein dedicated his version of
Genealogies of the Nobles by 9th century Muslim historian
Al-Baladhuri, published in 1938, to fellow Hebrew University Arabist
Levi Billig, who had been murdered a year earlier by an Arab assassin during the
1936-1939 Arab revolt in Palestine. From 1948, Goitein began his life's work on the Cairo Geniza documents. An especially rich
geniza with a large volume of correspondence was discovered in
Old Cairo containing thousands of documents dating from the 9th to the 13th centuries. As many Jews began letters and documents with the words "With the help of God," the papers reflected all aspects of everyday life in the countries of North Africa and bordering the Mediterranean. The documents included many letters from Jewish traders
en route from Tunisia and Egypt to Yemen and ultimately to India. The papers were mostly written in
Judeo-Arabic characters. After deciphering the documents, and during his time as a professor at the University of Pennsylvania (1955-71), and the
Cairo Geniza material, of which he was considered the preeminent scholar. ==Agnon correspondence==