1997 to 2001

Holy Trinity was established as an independent school by a group of committed parents in 1997 with a core group of twelve freshmen, and made possible only through the generosity and facilities of St. Luke’s Catholic Church in Temple.  The school was housed in the Religious Education Building on the St. Luke’s Catholic Church campus. Adding bus transportation in January 2001 allowed students from south and west Bell County to access our school.  During its first four years, Holy Trinity added many athletic and extra-curricular programs to the school, including the first drama production, first newspaper, and first yearbook in 200. The first class graduated from Holy Trinity in 2001.

2001 to 2010

In August 2001, the school moved to the Vandiver school building, a historic school building owned by the Temple Independent School District. In 2004, the school was allowed use of the adjacent modular building, now known as the Assisi Annex.  In 2005, Holy Trinity secured a donation of a portable science building from the Cameron Independent School District and through the generosity of the EBCO company was able to move the building, creating the EBCO Science Center.  In 2007, the school added another modular building, now known as the Aquinas Math Building.  During the past several years, Holy Trinity has increased its academic offerings to include many advanced placements and dual credit classes.  In recent years, the school has had significant success in extra-curricular activities, including five state championships in academics, two state championships in boys golf, and a girls' state championship in 2009 and 2010.

2010 to the Present

On November 30, 2010, the students, faculty, staff, parents, and volunteers moved the school into its new and permanent home at 6608 W. Adams Avenue.  The move to the 31-acre campus marked a significant turn for the school.  Though the building is different, the wonderful work begun in humbler homes continues.  Holy Trinity continues to offer an enriching spiritual life, a challenging academic curriculum, and a complete extra-curricular program.  These three components make Holy Trinity a school that seeks to educate the whole person. During the summer of 2012 construction began on the Tornado Safe Shelter. It was completed in October 2012 and we began to use it as a cafeteria and auditorium. Prior to this building, lunch was eaten in the gym, and all school events were held in the gym as well. During the winter of 2012, the softball and baseball fields were completed. Construction was completed summer of 2014 on the new stone entrance sign and renovation of the science classroom. During the summer of 2015, the science lab was renovated. During the summer of 2016, the Celtic Fitness Center was built.