To date, only the following is known about him: after 1206 he wrote a Summa de Sacramentis (unpublished), in which he follows the teachings of Gilbert of Poitiers. Of particular importance is his doctrine on the sacramental efficacy of Penance, in which the importance of the opus operatum is emphasized.
BIBL.: M. Grabmann, Gesch. d. scholast. Methode, II, Freiburg in Br. 1911, pp. 487-88; A. Landgraf, s. V. in LTHK, IV, col. 739. Anneliese Maier