ALEXANDER I SIXTUS / JULIUS I LIBERIUS FELIX II / STEPHEN SIXTUS II / Joseph McCabe / Justin Martyr / JULIAN JOVIAN VALENTINIAN VALENS GRATIAN / TITUS DOMITIAN / GREGORY THAUMATURGUS / CELESTINE I SIXTUS III / SYLVESTER I MARCUS / PIUS I ANICETUS SOTER / ALEXANDER SEVERUS / /