Vatican City as an independent sovereign state was established in 1929 through the Lateran Treaty between the Holy See and the Kingdom of Italy, making it about 96 years old as of 2025
. However, the site's religious and historical significance dates back much further. The first St. Peter’s Basilica was built in the 4th century (around 324 AD) under Emperor Constantine over the supposed tomb of Saint Peter, marking the Vatican's role as the seat of the Roman Catholic Church for nearly 1700 years
. In summary:
- Vatican City State: Established in 1929 (about 96 years old).
- Vatican as a religious center: Dates back to the 4th century, nearly 1700 years old.
