Austin Flannery has written: 'Saints in season' -- subject(s): Christian biography, Saints 'Vatican Council II' -- subject(s): Vatican Council (2nd : 1962-1965) 'Documents on the Vatican' 'Vatican Council 2' 'Vatican Council II' -- subject(s): Vatican Council (2nd : 1962-1965)
There are a number of congregations (departments) within the Vatican, such as the Sacred Congregation for the Causes of Saints which investigates candidates for sainthood.
On November 23, 2013, Pope Francis canonized 6 new saints in the Vatican.
Patronages are assigned by the Vatican, usually as the result of a petition requesting the action for a particular saint. Not all saints are patron saints.
The tombs of Saints Peter and Paul, many other popes and early martyrs have sanctified the Vatican and Rome with their blood.
All saints and blesseds are assigned a feast day by the Vatican's Sacred Congregation for the Causes of Saints.
Nobody, including the Vatican knows that number. There are between 10,000 and 20,000 named saints. There are many saints that are honored locally but not in the Universal Church. As to unnamed saints, only God knows that number.
The area of the Vatican and Rome has seen the blood of hundreds of martyrs spilled over the centuries and that makes the Vatican hallowed ground. It also contains the tombs of Saint Peter and a number of other saints.
Both are saints but patron saints are "specialists" who have been declared by the Vatican to the the patrons, or protectors, of certain vocations or groups of people. This is much like the medical field where we have doctors and specialists.
Saints, they called 2 challenges, and were only ones to call challenge.
Not even the Vatican has a list of all the saints. There are between 10,000 and 20,000 named saints. I have placed a link below to the Patron Saint Index that lists several thousand.
There are well over 10,000 named saints, some of which are not recorded in the Vatican. It would not be possible to even begin to list them here. Check this link for a partial list.