Vatican City
The name was first used in the Lateran Treaty, signed on 11 February 1929, which established the modern city-state. The name is taken from Vatican Hill, the geographic location of the state. "Vatican" is derived from the name of an Etruscan settlement, "Vatica" or "Vaticum" meaning garden, located in the general area the Romans called "vaticanus ager", "Vatican territory".
Vatican Library
Pope Nicholas V (1447-1455) envisioned a new Rome with extensive public works to lure pilgrims and scholars alike to the city to begin its transformation. Nicolas decided that he wanted to create a 'public library' for Rome that was meant to be seen as an institution for humanist scholarship. His death prevented him from carrying out his plan of a public library, but his idea lived on with his successor Pope Sixtus IV (1471-1484) who established what is now known as the Vatican Library.