The seminary had roots from the Missionary Training Institute, a school established by A.B.
[1] Simpson originally opened the Missionary Training Institute in Times Square, New York in 1883; in 1898 it moved a few miles away to South Nyack.
In 1974, the program was redesigned and subsequently renamed to the Alliance School of Theology and Missions.
[4] In 2019, Nyack College closed Alliance Theological Seminary in Rockland County and moved all operations to the Manhattan campus.
[5] After changing its name to Alliance University, the college closed on August 31, 2023 after years of financial struggles.