Prince Chitcharoen, the Prince Narisara Nuwattiwong, Prince Naris for short, né Chitcharoen (จิตรเจริญ), was a member of the royal family of Siam, minister, general and scholar. A polymath, he became known as "the great craftsman of Siam" and "the prince master". The anniversary of his birth, 28 April, is celebrated in Thailand as "Prince Naris Day".

Mongkut was the fourth king of Siam under the House of Chakri, titled Rama IV. He ruled from 1851 to 1868. His full title in Thai was Phra Poramenthra Ramathibodhi Srisindra Maha Mongkut Phra Chomklao Chao Yu Hua Phra Sayam Thewa Maha Makut Witthaya Maharat.