Angelis became Cardinal Protopriest ( the longest - serving member of the order of Cardinal Priests ) on the following 4 December .
Angelis attended the First Vatican Council ( 1868 - 1870 ) , of which he was made chief presiding officer on 30 December 1869 .
Becoming Cardinal Protopriest ( the longest - serving member of the order of Cardinal Priests ) on the following 4 December , Angelis attended the First Vatican Council ( 1868 - 1870 ) , of which he was made chief presiding officer on 30 December 1869 .