Bubulcus, Boulcus or Bovicus of Vindonissa was a bishop. From 517 to 534 he was the first bishop of Vindonissa (Bishopric of Windisch-Konstanz). As such he took part in the Synod of Epao-Jenne in Burgundy in 517. Johann Ernst Christian Schmidt, Friedrich Wilhelm Rettberg: Handbuch der christlichen Kirchengeschichte.
According to an inscription discovered in Vindonissa, the seat of the bishopric was moved to Constance in 590. , Universität Tübingen Since there is no clear surviving literary source proving when the diocese of Windisch-Constance was founded, Maximus (or according to other sources Gaudentius) is considered to be the first bishop of Constance with the foundation of the diocese of Constance around 585-590 by the Alemannic dukes with the help of Pope Gregory I. Überblick bei Helmut Maurer, 2003: Die Konstanzer Bischöfe vom Ende des 6. Jahrhunderts bis 1206. (= Germania Sacra. N. F. 42a). de Gruyter, Berlin 2003, ISBN 3-11-017664-5. (Digitalisat).
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