The Vatican newspaper, L'Osservatore Romano, said that after seven years as bishop of Vinh Long, in 1968 at the age of 62, he was allowed to resign after "a serious illness."
He lived in Nice, France, since 1985.
The website catholic-hierarchy.org lists the next oldest bishop as Francis Hong Yong-ho of Pyongyang, North Korea. The Vatican yearbook still lists him as the diocese's bishop, but says he has "disappeared." He had been arrested by the communists in 1949. If he is alive, he would be 105.
Retired Bishop Gery Leuliet of Amiens, France, is next at 102.
The oldest living U.S. bishop is sixth on the list: retired Archbishop Peter L. Gerety of Newark, N.J., will be 100 in July.