Louis Marie Grignion de Montfort, the founder of the religious institute, Montfort Brothers of St. Gabriel, because of the confusion which resulted due to three other schools in Singapore using the name Holy Innocents', namely Holy Innocents' Boys School, Holy Innocents' High School, and Holy Innocents' English School. By the 1960s, Montfort School was synonymous with quality education provided by the Brothers of St Gabriel in the Upper Serangoon District. In 1974, the full school split into Montfort Secondary and Montfort Junior. In 1984, a decision was made by the Old Montfortian Association (OMA), led by its president, Lim Boon Heng, to relocate Montfort Junior and Secondary Schools to make them comparable to the newer Government Schools. A Building Fund Committee was formed to raise the funds to finance the building project, the cost of which amounted to $24 million. Capital grant from the Government was $18.5 million, and the schools had to raise $5.5 million. Piling began in August 1989 at the new site at Hougang Avenue 8, immediately after a ground-breaking ceremony which was officiated by Mgr Gregory Yong, on 12 August 1989. The main building works of the two schools started in March 1990 and took about 21 months to complete. Progress as Montfort Secondary School On 2 January 1992, the two schools, Montfort Junior and Montfort Secondary, started functioning at their new premises as separate institutions. In 1997, the school underwent repairs and redecoration. At the end of 2009, Montfort Secondary School underwent major redevelopment works which was under the Programme for Rebuilding and Improving Existing Schools (PRIME). The school was opened on 2 January 2012 and Montfort Secondary School returned to its Hougang location. Montfort celebrated its 90th anniversary in 2006 with a 90 km run to its former location and a thanksgiving mass conducted by the Archbishop of Singapore, Nicholas Chia, a former pupil of the school. The mass was held in Church of the Nativity of the Blessed Virgin Mary, the church at the old location of the school. In 2017, Montfort had a centennial mass in Church of the Nativity of the Blessed Virgin Mary as a part of its celebrations for its 100th anniversary. Identity and culture School crest The top-left quadrant has the letters A.M. for "Ave Maria", and a lily. The bottom-right quadrant has the letters D+S with a cross. D.S. is the abbreviation for Dieu Seul ("God Alone"