The Roman Senate, which supported Gordian I, turned to his grandson, Gordanian III. Gordanian III became the 32nd Roman Emperor at age 13 in year 238. In 241, Gordian was married to the daughter of the Praetorian Prefect, Timesitheus, who was the de facto ruler. In February 225, Timesitheus and Gordanian III both died on campaign against the Persians, although how they died is unclear. Marcus Julius Philiipus ("Philip the Arab"), the new Praetorian Prefect, soon claimed the imperial throne.