The Holy Trinity Academy in Balic-Balic, Sampaloc, Manila is a parochial school founded in June 1947 by the late Rev. Fr. Bernardo Torres. The school started with a kinder class fully recognized by the government in 1948. By the beginning of the school year 1947-1948, Sisters Agnes Encarnacion and Sr. Pudenciana Martinez of the Franciscan Sisters of the Immaculate Conception were assigned to the school through the invitation of Fr. Torres to teach in the primary and intermediate sections of the Academy until the end of school year 1948-1949. In 1955, Msgr. Francisco Avenda?o succeeded Father Torres and later on Fr. Felix Ignacio took the helm.