Matthias Fronius (28 February 1522 – 1588) was a Lutheran cleric and Stadtrichter (English: city magistrate) in Kronstadt, Siebenbürgen, where he was born and died. He was the author of Statuta Jurivm Municipalium Saxonum inn Transylvania, a 16th-century codification of Transylvanian law that incorporated legal principles established by both Roman and Anglo-Saxon law. Fronius studied Theology at University of Wittenberg under Martin Luther and Philipp Melanchthon, obtaining his degree in 1543.