The Angel and the Sword (Guardian Angel series)

In the second book in The Guardian Angel series, angel Pelagius visits AD 1351 and introduces readers to Raphael, a young man trained to be a court jester in Avignon, France. His study of juggling, acrobatics, and knife throwing is supported by his patron, the most powerful man in Europe, Pope Clement VI. But when Raphael is falsely accused of attempting to murder the pope, his talents become tools for survival as he pursues the identity of the real would–be murderer.