Assumption College is a Roman Catholic all-boys private school in Bangkok, Thailand. The school was founded by Father Emile-August Colombet on 16 February 1885, and is the first school founded by the Order of Brothers of Christian Instruction of St Gabriel. Assumption College is the third-oldest boys school in the country.

Sulak Sivaraksa is a Thai social activist, professor, writer and the founder and director of the Thai NGO "Sathirakoses-Nagapradeepa Foundation", named after two authorities on Thai culture, Sathirakoses and Nagapradeepa. He initiated a number of social, humanitarian, ecological and spiritual movements and organizations in Thailand, such as the College SEM.