FEROTIN, MARIUS. — Benedictine monk, paleographer, and historian of liturgy, b. at Chateauneuf-sur-Rhone on 18 Nov. 1855. He entered the monastery of Solems in 1874 and professed the monastic Rule on 8 Sept. 1876. From 1881 to 1892 he resided at S. Domingo de Silos in Spain, and in 1895 he went to S. Michele di Farnborough, where he d. on 15 Sept. 1914.
He spent his life in prayer and study, and his monumental works on Mozarabic liturgy demonstrate his mastery of this field. Equal to the acuteness of his intellect was the profound critical spirit he brought to bear on the study of the Spanish High Middle Ages. In the monastery of Silos, in Old Castile, he found documents of great historical interest for the knowledge of Spanish religious life. The fruit of this research was first a collection of the rich material existing in the monastery: *Recueil des chartes de l'abbaye de Silos* (Paris 1897), followed by a *Histoire de l'Abbaye de Silos* (ibid. 1897). Among the precious manuscripts preserved there he discovered the Ritual in use in Spain before the Arab invasion of 712 and published it in vol. V of the *Monumenta Ecclesiae Liturgica*: *Le Liber Ordinum*, en usage dans l'Église wisigothique et mozarabe de l'Espagne du VIe au XIe siècle* (Paris 1904). In vol. VI of the same *Monumenta* he then published the *Liber mozarabicus Sacramentorum et les manuscrits mozarabes* (ibid. 1912). Other volumes were to follow on the *Liber antiquorum* and the *Liber Orationum*, but death prevented him.
He made many other publications in journals and volumes, but his name remains strongly linked to the study of Mozarabic liturgy, where he left a deep mark for the breadth of his research, the scope of his investigations, and the seriousness of his judgments.
FERRARO. — A large cloak of silk or other light fabric, red, violet, or black in color according to the rank of the wearer: cardinal, bishop, priest, and it is fastened at the neck by strips of the same cloth.
It is always worn over the cassock, but the black *ferraiolo* of ample or even reduced form is commonly considered an integral part of clerical dress and is worn over the black cassock in the summer months.
A pleated black *ferraiolo* reaching from the shoulders to the knee is worn by certain dignitaries of the Papal Court (gentlemen of the sword and cape, ushers, etc.) as their own distinctive insignia.
The *ferraiolo* was part of the dress of nobles in the 16th and 17th centuries, to whose class many clerics belonged.