2008-11-15T11:52:26-05:00 GCI info@gospel.com /feeds/topics/papacy/ http://chitorch.org/index.php/eras/early-church/leo/ 2008-11-15T11:52:26-05:00 Christian History Institute's study module on Leo the Great's third Sermon On the third Anniversary of His Elevation to the Pontificate, in which he extends papal claims.