 When King Mongkut died in 1868, the Great Council was assembled again.It selected 15-year-old Prince Chulalongkorn, the oldest son of King Mongkut, and Chao Phraya Sri Suriyawongse, a leading member of the powerful Bunnag family, was appointed regent.The council also named the son of the former second king, Prince Yodyingyot (1838–1885, later known as Prince Bovorn Vichaichan), as the "uparat" (ancient title for "vice king.")