Meantime, Fr. Esquenet made use of a small chapel in Peñafrancia which became an extension of the parish and where he started a small school for about 50 children. After Fr. Esquenet was assigned to another parish in Lipa, Batangas in September 1912, Fr. Godfried (Godofredo) Aldenhuijsen, popularly known as Father Godo, took over the parish. Aside from parish work, Fr. Godofredo continued what Fr. Esquenet had started – educating the young in his small chapel. During the time of Fr. Godofredo, Paco Catholic School emerged as an institution to reckon with becoming the largest parochial school in the Far East. In June 1913, following an increase in enrollment, Fr. Godofredo asked the Belgian Mothers (CMSA now ICM) from St. Theresa's College to help in running the school in Peñafrancia. Thereafter, enrolment steadily increased by one grade level every year until the primary course (Grade 1-4) was completed. Finally in 1916, the Grade School was fully recognized by the government. When Fr. Godofredo was transferred to Pasig in September 1919, Fr. Josef Billiet became the Parish Priest of Paco, a position he held for 10 years. Finding it too inconvenient to administer a growing school which was quite a distance from the convent of Paco, he had a wooden building of five rooms constructed along Trece de Agosto Street on the North and along the estero on the South of the present site of Paco Catholic School. The students of Peñafrancia transferred to the new building in the early 1920s. March 1931 marked the return of Fr. Godofredo to Paco after an absence of 12 years. The old church, started by Fr. Esquenet in 1908 and completed by Fr. Godofredo in 1912, was reconverted into four classrooms in 1932. A second floor was added to it to serve as the Mother's convent and on May 21, 1933, they came to live permanently in the church-school compound. In 1933, the Intermediate level (Grades 5-7) was granted government recognition. A year after, a three-story concrete edifice was constructed and the first year course in High School was offered. Paco Catholic School accepted its first 13 students in the new high school building, named the Sacred Heart Building (now known as the Fr. Godofredo Aldenhuijsen Heritage Center).