Such dancers could be athletic and graceful or tumble in a jesting manner, playing for laughter. They could also be well paid and respected - Richard II paid John Katerine, a dancer from Venice, over £6 for playing and dancing before him, a sum not far short of £3,000 today.
However jugglers were also held in affection, even by the church, and many illuminated manuscripts show jugglers. From the time of William the Conqueror, a 'King of the Jugglers' appeared at the court and would continue to appear through the Middle Ages. Whoever held this title had many rights to go with it. There is also a medieval legend of a juggler who, having nothing else to give, made an 'offering' of his juggling skills before a statue of the Virgin and Child in church. According to some variations of this story, the Madonna or Jesus caught one of the balls.
Balls were commonly used for juggling but other things could also be used. In the Irish story of Cuchulainn, the hero juggles nine apples. The later Viking sagas also mention juggling and sometimes with weapons - Snorri Sturluson writes in one saga, "In the doorway of the hall, Gylfi saw a man juggling with knives, keeping seven in the air at a time.", a trick also mastered by Sunniva in "A Knight's Captive"
[Illustrations from Wikimedia Commons.]