Prime Minister of Thailand Rajanubhab took over this role. In fact, the office most considered the precursor of that of the prime minister was the ancient office of "Samuha Nayok" (สมุหนายก), which was run by an "Akkhra Maha Senabodi" (อัครมหาเสนาบดี) or "chief minister in charge of civilian affairs". The first Prime Minister of Siam was Phraya Manopakorn Nititada, a judge. The title of the office was changed from "Prime Minister "of Siam"" to "Prime Minister "of Thailand"" in 1945 and then permanently with the renaming of Siam to Thailand in 1949. For most of its existence the office has been occupied by Army leaders;
Prime Minister of Iran Prime Minister of Iran The Prime Minister of Iran was a political post in Iran that had existed during several different periods of time starting with the Qajar era (when the country was internationally known as Persia) until its most recent revival from 1979 to 1989 following the Iranian Revolution. In the Qajar era, prime ministers were known by different titles. The post itself was mainly known as "ataabak" or "ataabak-e a'zam" (grand "ataabak"), or sometimes "sadr-e a'zam" (premier) at the beginning, but became "ra'is ol-vozaraa" (head of ministers) at the end. The title of "nakhost vazir" (prime minister) was