The pope is elected in the Conclave, composed of all the cardinal electors (now limited to all the cardinals below the age of 80), after the death or resignation of the previous Pope. The Conclave is held in the Sistine Chapel, where all the electors are locked in (Latin cum clave) until the election for which a two-thirds majority is required. The faithful can follow the results of the polls (usually two in the morning and two in the evening, until election) by a chimney-top, visible from St. Peter's Square: in a stove attached to the chimney are burnt the voting papers, and additives make the resulting smoke black (fumata nera) in case of no election, white (fumata bianca) when the new pope is finally elected. The Dean of the Sacred College (Cardinale Decano) will then ask the freshly elected pope to choose his pastoral name, and as soon as the pope is dressed with the white habit, the Senior Cardinal-Deacon (Cardinale Protodiacono) appears on the major balcony of St. Peter's façade to introduce the new pope[2] with the famous Latin sentence
Annuntio vobis gaudium magnum: habemus papam.(I announce to you a great joy: We have a Pope).
Sistine Chapel (Latin: Sacellum Sixtinum; Italian: Cappella Sistina) is the best-known chapel in the Apostolic Palace, the official residence of the Pope in the Vatican City.
The following are images from various Vatican City-related articles on Wikipedia.
Image 1The Apostolic Palace (Palazzo Apostolico), the official residence of the Pope. Here, Benedict XVI is at the window marked by a maroon banner hanging from the windowsill at centre. (from Vatican City)
Image 9A monument to Fr. Maximilian Kolbe, among the estimated 3,000 members (18%) of the Polish clergy who were killed by the Nazis; of these, 1,992 died in concentration camps. (from Vatican City during World War II)