From the AP:
VATICAN CITY (AP) — Twenty-six Swiss men have joined the oldest standing army in the world, swearing to give up their lives to protect the pope as the Vatican's newest Swiss Guards.
The swearing-in ceremony took place Sunday inside the Vatican auditorium — a last-minute change due to rain. Usually it is held in the St. Damaso courtyard of the Apostolic Palace.
The ceremony is held each May 6 to commemorate the day in 1527 when 147 Swiss Guards died protecting Pope Clement VII during the Sack of Rome.