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 Romania d'etat, followed by a constitutional referendum that replaced the Convention of Paris, an act that served as the constitution of the country, with his own version named the Statute expanding the Paris Convention (). The new constitution created the Senate for serving Cuza's legislative purposes and vested the office of the Prince with full executive authority, while the Prime Minister remained his subordinate. Even though Cuza now had plenary powers, the office the Prime Minister remained influent, and Mihail Kogălniceanu, the 3rd Prime Minister, a liberal and former ally of Cuza often clashed with him. After Cuza's removal by coup