Sistine

The conclave, which traditionally starts after a two-week mourning period, sees the College of Cardinals gather in the Vatican's Sistine Chapel to cast a series of votes to choose the next pope.

Michelangelo's awesome frescoes of the Sistine Chapel are still stunning first-time visitors, but the papal crown has long been put aside and the Pope moves among adoring crowds on a popemobile, or a small family car, not a sedan chair.

This is when the College of Cardinals will gather in the Sistine Chapel in Vatican City for the conclave.

The conclave is a gathering of 120 cardinals who hold a secret ballot in the Sistine Chapel to elect the next pope.

King Charles has been a great advocate of building links between different faiths and the planned state visit to the Vatican would have seen symbolic moments such as an ecumenical service in the Sistine Chapel.