1868 - A two-room school is opened at St. Mary in Saginaw by the people of the parish and the pastor.
1873 - St. Andrew School opens
It opened on the corner of Monroe and Fayette Streets.There are two teachers and 120 students, taught by the Sisters of Divine Providence.
1914 - 7 Catholic Schools in operation
There are five Catholic schools operated by parishes on the East Side: St. Joseph, St. Mary, Holy Family, Holy Rosary and Sacred Heart. On the west side are Ss. Peter and Paul and St. Andrew.
1938 - The Diocese of Saginaw is established by Pope Pius XI
The Most Rev. William F. Murphy is installed as the first bishop.
1952 - St. Stephen School opens
It opens with the school and church in one building – after several years of Masses held at the Court Theater.
1950s - 30 new schools are built across the diocese
Under the Most Rev. Stephen S. Woznicki, 30 new schools are built across the diocese, including St. Thomas Aquinas School, and 17 additions and major repairs are made to existing facilities to improve the quality of school buildings.
1959 - 15,000 Catholic students in diocese
There are approximately 15,000 students in Catholic schools across the diocese. There are nine religious communities providing sisters to teach in the schools.
1960 - St. Paul Seminary opens
It opens as a secondary and junior college boarding school to educate young men as possible candidates for the priesthood.
1984 - Nouvel Catholic Central opens
It merges the students of St. Mary, Ss. Peter & Paul and St. Stephen high schools.
2006 - Saginaw Area Catholic Schools forms
It brings together St. Helen School, Ss. Peter & Paul School, St. Stephen School, St. Thomas Aquinas School and Nouvel Catholic Central High School under one umbrella.
2010 - Further consolidation
The four parish elementary/middle schools are consolidated into two: St. Stephen School and St. Thomas Aquinas School.