There are no known records of Tutankhamun after his death, and, as a result, he remained virtually unknown for centuries. Even the location of his tomb was lost as its entrance had been covered by the debris from a tomb structure built later.
People thought King Tut died because he got a blow to the head, it was actually from mishandling the mummy. Scans said that he said he got a broken leg and that's how he died.
There is a King Tut day when everyone will remember when a team of archeologists led by howard carter found the entrance to King Tut's tomb in Egypt in 1922. Ever since that day, November 4 has been known as King Tut day.