Lex Frisionum is a pivotal legal text offering invaluable insights into the laws and customs of the Frisians during the early Middle Ages. Compiled to codify the traditional laws of Frisia, this document provides a detailed view of the social structure, legal practices, and cultural norms prevalent in the region. Authored by Sibrandus T. Siccama and Carl Wilhelm Gaertner, this work remains essential for understanding Germanic legal traditions and the historical development of Frisian society.