Recently scholars have determined that the same Rolandus who wrote the Stroma on Gratian's Decretum also composed a theological treatise, the Sententie Rolandi Bononiensis magistri.   Rolandus son of Rainucci cannot be credited as the author of any legal or theological work. He was, nonetheless, most probably a learned theologian who taught for a while at Bologna (before ca. 1142).  The proof is established from a comment by the canonist Huguccio (ca. 1190) (C.2 q.6 c.31: Munich, Staatsbibl. 10247, fol. 109r:  “et Alexandro tertio Bononie residente in cathedra magistrali in divina pagina ante appellatum eius;” the abbot of Mont Saint Michel, Robert de Torigny also noted that Rolandus taught theology in Bologna. 

Rudolf Weigand, “Magister Rolandus und Papst Alexander III.” Archiv für katholisches Kirchenrecht 149 (1980) 3-44 and Weigand’s "Glossen des Magister Rolandus zum Dekret Gratians.” Miscellanea Rolando Bandinelli, Papa Alessandro III, ed. Filippo Liotta. (Accademia senese degli intronati. Siena: 1986) 391-423.