COLINI, LUDOVICO. - Franciscan theologian, commonly called L. da Castelplanio, born at Castelplanio (Ancona) on 31 March 1830, died at Rome on 19 Dec. 1874. Having received the habit of the Minors at the Porziuncola (Assisi) in 1845, he acquired a solid theological education through study and teaching. In 1862, having become private theologian to Monsignor Bernardino Trionfetti (formerly minister general of the Friars Minor and subsequently bishop of Terracina, Sezze, and Piperno), he accompanied him to the Vatican Council, where he became known and esteemed.
He published: Esposizione del Sillabo (Velletri 1865); Il Concilio Ecumenico Vaticano al cospetto dell'odierna società (Naples 1869, 2nd ed. Turin 1870); Il Concilio Ecumenico Vaticano ed i cattolici liberali (Turin 1870);
De controversia infallibilitatis (Naples 1870); Maria nel consiglio dell'Eterno, ovvero la Vergine predestinata alla missione medesima con Gesù Cristo (4 vols., ibid. 1872 ff., 2nd ed. ibid. 1904, 3rd ed. Milan 1942, abridged by M. Andreoletti, edited by A. Gemelli): this is C.'s masterpiece and one of the most extensive modern studies of Mariology; Seraphicus Doctor Bonaventura in Oecumenicis Catholicae Ecclesiae Conciliis cum Patribus dogmata definiens (Rome 1874).