In Vatican City, thus the name Vatican Council II.
Vatican Council I was the first Ecumenical Council to be held at the Vatican in Vatican City which is an independent country.
It was held in Vatican City from 1962-1965.
Most sessions were held in the Vatican and at other locations in Rome and Italy.
The council was held mostly at the Vatican but some meetings were held at other venues in and around Rome.
The First Vatican Council was held in Rome, Italy in the Basilica of St. John Lateran.
in Rome
It was held 1869-70.
Vatican Council II (1962 - 1965) was held in Vatican City located in Rome, Italy.
The First Vatican Council was convoked by Pope Pius IX on 29 June 1868 and was formally closed in 1960 prior to Vatican II
About the only voting in Vatican City is when a papal conclave is held. Only the cardinal electors vote in that.
Vatican II was held in four sessions in the autumn of the years 1962-1965.
Until the Second Vatican Counsel (commonly referred to as "Vatican II") that was held in the early 1960s, Catholic mass was always held in Latin to preserve the original Roman traditions. After Vatican II was concluced in December 1965, the Catholic Church decided that mass would be held in the local vernacular instead of in Latin.