"We can't have full knowledge all at once. We must start by believing; then afterwards we may be led on to master the evidence for ourselves"


Welcome to St. Thomas Aquinas
Catholic High School

Guam's newest Archdiocesan Catholic co-educational high school offering a college preparatory academic program that challenges and develops its students to become moral and productive citizens with global perspectives firmly rooted in the Gospel of Jesus Christ through the teachings of the Catholic Church.

STA Online Payment


Christmas Carolling at DMR.



Japanese Exchange Activity - Tokyo Gakkan Niigata High School. Photo Gallery



Procession of Santa Marian Kamalen. Photo Gallery


We Three Kings.  Photo Gallery

Photo Gallery

Photo Gallery of Japanese Cultural Performance at STA. (196 images)