Question: has there ever been a hole in one on a par 4

Answer: Yes, During the second round of the 1971 Martini International tournament, held at the Royal Norwich Golf Club in England, John Hudson had two consecutive holes in one. Teeing off, using a 4-iron, at the par-three, 195-yard 11th hole, Hudson holed his tee shot for a hole-in-one. At the next hole, the downhill 311-yard, par-four 12th, and this time using a driver, he once again holed his tee shot, for another ace. This is believed to be the only time a player has scored holes-in-one at consecutive holes in a major professional tournament.