For those holding doctoral degrees from a pontifical university or faculty "the principal mark of a Doctor's dignity is the four horned biretta." The 1917 Code of Canon Law canon 1378 and 1922 commentary prescribe the four corned "biretum doctorale" and doctoral ring or "annulum doctorale" for doctorates in philosophy, theology, canon law, specifying that the "biretum" should decorated according to the color of the faculty ("diverso colore ornatum pro Facultate"). The 'traditional' "Angelicum" biretta is white to correspond to the white Dominican habit. However, the Academic Senate of the "Angelicum" in its May 2011 meeting indicated that for the Licentiate and Doctorate a black biretta may be used with colored piping and pom to follow the color of the faculty.