Suankularb Wittayalai School literally Rose Garden College is an all-boys secondary school for grades 7 through 12 in Bangkok, Thailand. Founded by King Chulalongkorn in 1882 as a peer's school, its purpose was to educate the children of nobility and the royal household. Suankularb is the oldest public secondary school in the country. Suankularb alumni include eight Prime Ministers of Thailand, nine Supreme Court Chief Justices, five attorneys general, two Fortune Global 500 chief executives, scholars, as well as a number of prominent politicians and businessmen. Suankularb is a member of Jaturamitr group of the four oldest boys' schools in Thailand. Suankularb consists of 11 campuses all over Thailand.

Phraya Manopakorn Nitithada was the first Prime Minister of Siam after the Siamese Revolution of 1932 as he was selected by the leader of the People's Party – the party that instigated the revolution. However, in the following year, Manoparkorn was ousted by a coup in 1933 due to the conflicts between members of People's Party.