Give some stream of consciousness and then the answer. The Sistine Chapel (/ sstin tpl /; Latin: Sacellum Sixtinum; Italian: Cappella Sistina ( kapplla sistina) ) is a chapel in the Apostolic Palace, the official residence of the Pope, in Vatican City. Originally known as the Cappella Magna, the chapel takes its name from Pope Sixtus IV, who restored it between 1477 and 1480. Since that time, the chapel has served as a place of both religious and functionary papal activity. Today it is the site of the Papal conclave, the process by which a new pope is selected. The fame of the Sistine Chapel lies mainly in the frescos that decorate the interior, and most particularly the Sistine Chapel ceiling and The Last Judgment by Michelangelo.

Based on this passage, where is the sistine chapel located in the vatican?
The relevant sentence in the passage is: The Sistine Chapel (/ sstin tpl /; Latin: Sacellum Sixtinum; Italian: Cappella Sistina ( kapplla sistina) ) is a chapel in the Apostolic Palace, the official residence of the Pope, in Vatican City.
Therefore, the answer is the Apostolic Palace , the official residence of the Pope , in Vatican City.