GREGORIUS, CARDINALIS. — Canonist of the 11th–12th century, cardinal, d. 21 Nov. 1113. Between 1104 and 1106 he composed a collection called the *Polycarpus*, dedicated to Diego, bishop of Compostella.
Besides passages drawn from the *Corpus iuris civilis*, it contains many texts from the *Decretum* of Burchard and other Italian Gregorian collections. A second recension of this collection was made c. 1130–40 with the insertion of many forged documents. Partial editions of the collection in the form of extracts are found in A. Mai, *Nova bibliotheca Patrum*, VII, 3, Rome 1888, pp. 1–76; in *PL* 56, 346; in F. Theiner, *Disquisitiones criticae in praecipuas canonum et decretalium collectiones*, Rome 1836, pp. 356 ff. (rubrics of the collection are cited).