I was on the vatican museums official website and was able to find slots for a tour in March that includes: the Pio Clementino Museum, the Gallery of the Candelabras, the Gallery of the Geographical Maps, and the Gallery of the Tapestries (Renaissance art), the Raphael Rooms and the Sistine Chapel. Duration of the tour is about 2 hours.
There are no spots available for a tour that includes the above plus St Peters Basilica.
Can we do the Basilica ourselves without a tour? Do we need to buy a separate ticket for the Basilica?