Though various units of Swiss Guards have existed throughout history, the most famous unit—and the only one remaining—is responsible for the safety of the Pope. Known for their colorful uniforms, the guards must be single, Swiss, and Catholic and must have completed Swiss military training. The first 150 Swiss mercenaries were invited to the Vatican during the reign of Pope Julius II. In 1527, 147 of the Swiss Guards were killed while helping the Pope escape from whom? Discuss (http://forum.thefreedictionary.com/postst32265_Swiss-Guard-Arrives-at-the-Vatican--1506-.aspx)
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