Noble Guard (Vatican) - Wikipedia
https://en.wikipedia.org/wiki/Noble_Guard_(Vatican)
The Noble Guard (Italian: Guardia Nobile) was one of the household guard units serving the Pope. It was formed by Pope Pius VII in 1801 as a regiment of heavy cavalry. Conceived as the Pope's personal guard, the unit provided a mounted escort for the Pope when he moved about Rome in his carriage and mounted guard outside his apartments in the papal palaces.
https://en.wikipedia.org/wiki/Noble_Guard_(Vatican)