At 84 years old, he created history as the oldest Sultan to ascend to the post and the only one to have held the post twice!
He succeeded Al-Wathiqu Billah Sultan Mizan Zainal Abidin Ibni Al-Marhum Sultan Mahmud Al-Muktafi Billah Shah who was the youngest ruler to hold the post. His reign as king ended on December 12, 2011.
In Malaysia's unique rotational monarchy system, 9 rulers from 9 different hereditary states take 5-year turns to be on the throne. The remaining 4 out of 13 states that form the country did not have monarchs and are headed by governors.
Read more about Malaysian Monarchy here.