Petit Seminaire Higher Secondary School is a higher secondary school for boys in the state of Pondicherry, India.
The history of Petit Seminaire dates back to 1844 as a seminary attended by 89 students of whom 25 were ecclesiastical students aspiring for priesthood. In 1873 it became a public college. In 1880, Petit Seminaire stopped receiving government subsidy, and has maintained its financial independence.
The student population showed an increase from 800 in 1903 to 1100 in 1907, of whom 700 were Catholics. In 1932, the English section was upgraded into a high school, preparing boys for matriculation and was affiliated with the Madras university. In July 1978, Petit Seminare was born again, this time as Petit Seminaire Higher Secondary School, offering two courses of study at the higher secondary level.
The school's motto is "Nil Magnum Nisi Bonum" meaning "Nothing is great unless it is good".