Daniel 5:28-32

‘Perēs’—your kingdom has been divided and given to the Medes and Persians.”

Then Belshazzar gave orders, and they clothed Daniel with purple and put a necklace of gold around his neck, and issued a proclamation concerning him that he now had authority as the third ruler in the kingdom.

That same night Belshazzar the Chaldean king was killed.

So Darius the Mede received the kingdom at about the age of sixty-two.