Andreas Lehnertz is a postdoctoral research fellow who focuses on social, cultural and religious history in Europe during the 13th to the early 16th centuries. He is interested in daily life Jewish-Christian relations, marginal Hebrew and Yiddish charter notes, Jewish as well as general sealing practices and Jewish craftspeople. In 2018, he completed his PhD at the Trier university with a study on Jewish Seals in the Medieval German Kingdom. Authentication and Self-Representation of Jewish Women and Men. Lehnertz is currently studying Jewish craftspeople in Medieval Europe.