Rorate Caeli

Lorber, FSSPX, prefaced by Cañizares, S.R.E. Card.

Magnificat Dominum is a new work produced by the wonderful Association Sacra Musica (France - page in English), not officially affiliated with any particular order or society, for the popularization of the basic pieces of Gregorian chant and of traditional vernacular hymnody among the faithful. The book's organizer? Father Bernard Lorber, FSSPX (SSPX), the priest behind Sacra Musica's greatest projects. 

Who penned its preface? Cardinal Cañizares Llovera, Prefect of the Congregation for Divine Worship. (Source: UnaVoce.fr; tip: Le Forum Catholique)