The Swiss Guard (Custodes Helvetici) are on duty to protect the Pope in the Vatican City during the last 500 years. The legend says the uniform was designed by Leonardo da Vinci, but its not seems very credible. Is the oldest military unit in the world. They can swear in different languages as Switzerland has various languages, german seems to be the favourite one, meanwhile the french and the italian are the others. They are in the duty of the Pope from January 21th 1,506 and they are far away to introduce women in this force.
Picture taken at the Vatican