Gregory Atta born Michael Atta (born 14 April 1815 in Zahle, Lebanon - died on 3 December 1899 in Damascus, Syria) was a bishop of the Melkite Greek Catholic Archeparchy of Homs, church historian and collector of antique manuscripts. He visited Europe in 1860–61 and campaigned among others for alms for the Oriental Christians in Bavaria (in the Roman Catholic dioceses of Augsburg, Wurzburg and Speyer). later served as a father of the First Vatican Council in Rome.