Summary from Wikipedia

As a scholar, Ben-Zvi conducted extensive research on Jewish communities in the Land of Israel, including those that existed before the foundation of the modern State of Israel. He preserved oral histories, gathered firsthand accounts and documentary evidence, and published a number of books and articles on the subject. He shed light on their traditions, language, folklore, and religious practices through his work, which frequently focused on the Mizrahi and Sephardic Jewish as well as the Samaritan communities. The Ben-Zvi Institute he founded and directed continues to be an important institu ...