Trinity Catholic High School was a Catholic High School at Our Lady Help of Christians Parish. The school was a co-educational and college preparatory school founded in 1894. The parish school closed in 2012, with Trinity merging with Mount Saint Joseph Academy to become St. Joseph Preparatory High School.
At that time, the parish high school building was rented by Cambridge Education Group and established as CATS Academy, a private non-religious school, catering mostly to international students. CATS Academy has since moved on to a new facility, while the parish welcomes Dearborn Academy for a 15-year lease that began in September 2016.
Records and information from Trinity Catholic are available at the Our Lady's Parish Office: 617-527-7560.