Education
He was graduated at Harvard in 1825, and at the Harvard Divinity School in 1828.
He was graduated at Harvard in 1825, and at the Harvard Divinity School in 1828.
In 1829 he was ordained pastor of the Unitarian church in Dover, New Hampshire, and on 17 June 1834, took charge of the Brattle Square Church in Boston, Massachusetts. The degree of Doctor of Divinity was conferred on him by Harvard in 1852. He was a delegate to the state constitutional convention of 1853.
His society moved to a new building in 1873, but dissolved in 1876, when Lothrop resigned the pastorate.
He was a member of the Boston School Committee for 30 years, and chairman of its committee on the English high school for 26.