Who Died in 343 AD Saint NicholasDecember 6 More 343 AD Deaths Articles About 343 St Nicholas – The Man Behind Santa Claus Saint Nicholas died on this day but happily the tradition associated with him of giving gifts to others, especially children, has survived the centuries.December 6 337 AD History by Year 346 AD Famous Romans Augustus Caesar Caligula Constantine the Great Julius Caesar Mark Antony Nero