was the son of .
He born at Rajaburi on February 26, 1768 he accompanied his
father on military campaigns as a young man. He was 16 when his
father ascended the throne and was immediately created a Prince
of the rank of Somdetch Chao Fa and given the name of
Isarasundorn. Appointed Maha Uparaja [ or Deputy King ] by his
father in 1806, he was the only Maha Uparaja to eventually
succeed to the throne during the period of the . He became king on the death of his father [at the
age of 42 ], King Rama I. His reign was a period of
consolidating the achievements of the previous reign and he
began the custom of appointing senior princes to supervise over
the different departments of state. He is best remembered though
for his interest in the .
He was an artist, writer, composer, which flourished during his
reign. He died on July 21. 1824 [ at the age of 58 ].