Andruzzi, Luigi, an Italian theologian, count of Sant Andrea, was born about 1688 or 1689 on the Isle of Cyprus. He probably belonged to a Venetian family. From 1709 to 1732 he was professor of Greek in the University of Bologna. He wrote several controversial works against Dositheus, patriarch of Jerusalem, for the defence of the Roman Catholic Church, as his opponent had attacked the infallibility of the pope, and revived the famous dispute upon the Filioque. He died near the middle of the 18th century. Among his principal works we notice, Vetus Graecia de Sancta Romana Sede Prceclare Sentiens, sive Responsio ad Dositheum Patriarchant Hierosolymitanum (Venice, 1713) — Consensus tum Grcecorum turn Latinorum Patrum de Processione Spiritus Sancti e Filio, contra Dositheum, Patriarchanm Hierosolymzitanum (Rome, 1716), dedicated to pope Clement XI: — Perpetua Ecclesice Doctrina de Infallibilitate Papce in Decidendis ex Cathedra Fidei Quaestionibus extra Concilium Ecumenicum et ante Fidelium Acceptionem (Bologna, 1720): — Vindiciae Sermnons Sancti Ildefonsi, Archiepiscopi Toletani, de 'Perpetua Virginitate ac Parturitione Dei Genitricis Marice (Rome, 1742). He also translated into Greek several homilies of Clement XI, and a speech of Benedict XIV. See Hoefer, Nouv. Biog. Generale, s.v.