Vatican Council I was the first Ecumenical Council to be held at the Vatican in Vatican City which is an independent country.

Pope Pius V called for the First Vatican Council.

The First Vatican Council was held in Rome, Italy in the Basilica of St. John Lateran.

There were exactly no doctrines defined at the Second Vatican Council. The Second Vatican Council was the first purely pastoral council ever held in the Church.

The First Vatican Council was convoked by Pope Pius IX on 29 June 1868 and was formally closed in 1960 prior to Vatican II