Giacomo della Porta's most famous church is probably the "Chiesa del Gesù" (lit. Church of the Gesu) in Rome.
He also participated in St. Peter's Basilica in Vatican (if I'm not mistaken, he worked on it's impressive dome).
He worked on different churches (and fountains) in Rome, but I think the only one in Vatican City is the Basilica (the project for this church is originally by Bramante, but most great architects during renaissance gave their interpretation, until Carlo Maderno completed it).
Giacomo della Porta was an Italian architect and sculptor, who worked on many important buildings in Rome, including St. Peter's Basilica. He was one of about 7 architects for the building of St. Peter's Basilica.
Yes, the Catholic Church is the only church in the Vatican.
Architect of This Church was created on 2009-07-13.
Vatican is the name of an independent country, not of a church.
No, the Vatican is the home of the Pope, who is head of the Catholic Church.
Ther Vatican is a country, not a church.
The Vatican is owned by the Catholic Church.
Vatican City is the home of the Pope. His home is close to St. Peter's Basilica, the largest church in the Vatican City.
The Second Vatican Council said nothing about beverages in Church.
Saint Peter's Basilica is in the Vatican.
The Vatican Church has many more years ahead of it as long as people continue to believe in God and are devote Catholics. The Vatican Church has been around since the 16th century.
Redimption world outreach center The Vatican.