A seminary, school of theology, theological seminary, or divinity school is an educational institution for educating students (sometimes called seminarians) in scripture and theology, generally to prepare them for ordination to serve as clergy, in academics, or mostly in Christian ministry. The English word is taken from seminarium, translated as 'seed-bed', an image taken from the Council of Trent document Cum adolescentium aetas which called for the first modern seminaries. In the United States, the term is currently used for graduate-level theological institutions, but historically it was used for high schools. The establishment of seminaries in modern times resulted from Roman Catholic reforms of the Counter-Reformation after the Council of Trent. These Tridentine seminaries placed great emphasis on spiritual formation and personal discipline as well as the study, first of philosophy as a base, and, then, as the final crown, theology. The oldest Catholic seminary in the United States is St. Mary's Seminary and University in Baltimore founded in 1791. In the United States, Protestant institutions also widely adopted the term 'seminary' for independent graduate schools (separate from a university) to train their ministers. The oldest such Protestant seminary in the United States was founded in Andover, Massachusetts in 1807 as the Andover Theological Seminary and was affiliated with the Congregationalist Church. After two mergers and a number of relocations, Andover is now part of the Yale Divinity School, in New Haven, Connecticut. Seminaries in the Catholic Church are divided into minor seminaries for teenagers and major seminaries for adults, including both college seminaries, sometimes also known as minor seminaries, for undergraduate students and post-graduate seminaries for those who already have a bachelor's degree. There are also seminaries for older adults who are well out of school, such as the Pope St. John XXIII National Seminary in Massachusetts, and for other more specialized purposes.