Seminary of the Immaculate Conception

It offered a number of academic degrees, primarily those of Master of Divinity (MDiv) and Doctor of Ministry (DMin).

The seminary was founded in 1926 in a house in Lloyd Harbor acquired by Thomas E. Molloy, Bishop of the Diocese of Brooklyn, which at that time covered all of Long Island.

It was an expansion of the original school, St. John's Seminary, located in Brooklyn and staffed by the priests of the Congregation of the Mission as a part of their historic commitment to the education of the clergy of the Catholic Church.

Due to the expanding population in the suburban counties of Nassau and Suffolk, in 1957 the Holy See separated them from the Diocese of Brooklyn.

[2] The library continued to operate after the end of the seminarian theology program, but closed its doors on December 16, 2020.