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Mass

St. ThomasMonthly all-school Mass, plus Holy Days of Obligation (Weekly opportunities for Mass, Confession, Adoration and Rosary in addition)
CathedralDaily — Mass for the whole school every day (Anglican-patrimony liturgy; regular Evensong and Lessons & Carols alongside.)
St. John XXIIIWeekly all-school Mass (Day not published; moves for Solemnities and Holy Days. Students attend in full Mass uniform.)

Retreats

St. ThomasCamp Aquinas freshman retreat; grade-level retreats; dedicated Director of Retreats. Basilian motto: "Teach me Goodness, Discipline, and Knowledge"
CathedralFreshman Retreat; Newman Retreat; House system (Benedict, Neri, Barbieri, De Sales)
St. John XXIIIMandatory class retreats (Oboedientia/Pax/Virtus/Renovatio) + optional Kairos (jr/sr) and Quest (fr/so); daily Mass + weekly all-school Mass

Daily Mass

St. ThomasNot Published
CathedralYes — built into the school day for all students
St. John XXIIIAvailable daily throughout the year (Plus Eucharistic adoration, twice-yearly penance services, daily Angelus)

Religious Tradition

St. ThomasBasilian Fathers — founded 1900. The school describes itself as the oldest college-preparatory high school for young men in Texas.
CathedralPersonal Ordinariate of the Chair of St. Peter (Bishop Lopes) — Anglican-patrimony Catholic liturgy: daily Mass for the whole school, regular Evensong, Lessons & Carols. Open to all students, not only Ordinariate members. Liturgies are held at the Cathedral of Our Lady of Walsingham.
St. John XXIIINot Published

Service Hours by Grade

St. ThomasNot Published
CathedralNot Published
St. John XXIIIFreshmen 20 · Sophomores 25 · Juniors 25 · Seniors 30 (per year, with due dates each spring)

Service Program

St. Thomas"Champions for Change" — six service experiences annually (service year Jun 1 - May 31)
CathedralNot Published
St. John XXIIINot Published

Commute from home

	St. Thomas High School	Cathedral High School	St. John XXIII College Preparatory
Tuition	$27,900 2026-27 rate	$22,850 2026-27 rate	$22,100 2026-27 rate
What's included	Included in tuition see list Laptop & technology Charged separately: Application fee: $75 Registration fee: $700 Camp Aquinas (freshman retreat): $650 (freshmen) Class retreat: $325 (returning/transfer students) Books: $550 Athletics fee: $250 (per sport) — optional AP exam: $99 (per course) — optional	Fees listed separately No itemized fees published.	Fees listed separately see fees New Student Enrollment Fee: $500 Financial aid application (Clarity): $60 — optional
Sibling discount	$2,000/yr per sibling after the first	Not Published	2nd student $17,680 ($4,420 off)
Lower school on campus	HS only	HS only	HS only
Open house	Dec 6, 2026	Nov 7, 2026	Not posted
Required test	ISEE Offered on campus: Nov 14, 2026 · Jan 9, 2027	ISEE (or CLT for classical-school students)	ISEE
Application deadline	Jan 15, 2027	Jan 15, 2027	Not posted
Decision date	Mar 5, 2027	Not posted	Not posted
Financial aid	Need-based + Merit	Need-based + Merit	Need-based + Merit
AP courses	21	Not posted	Not posted
Enrollment	791	Not Published	432
Student:Teacher	9:1	Not Published	11.3:1
Mass	Monthly	Daily	Weekly Daily Mass also offered
Sports	12 sports	11 sports	13 sports
Links	Full profile Admissions	Full profile Admissions	Full profile Admissions

“Not posted” means the school hasn’t published it yet for this admissions cycle — check each school’s full profile for sources.