From 1869 to 1870, Gibbons attended the First Vatican Council in Rome, where he was the youngest bishop present and voted in favor of the doctrine of papal infallibility.
Gibbons attended the First Vatican Council in Rome. This was from 1869 to 1870. Gibbons voted in favor of the doctrine of papal infallibility. This was from 1869 to 1870. He was the youngest bishop present.