Saint Thomas Academy (abbr. STA), originally known as St. Thomas Aquinas Seminary and formerly known as St. Thomas Military Academy, is the only all-male, Catholic, college-preparatory, military high school in Minnesota. It is located in Mendota Heights near Saint Paul. The Academy has a middle school (grades 6-8) and a high school (grades 9-12). The high school students are required to participate in military leadership classes, as the school was previously part of Army JROTC. Its sister school, Convent of the Visitation, is located across the street. Many classes and after-school activities involve both schools. It is located within the Archdiocese of Saint Paul and Minneapolis.