| Lorenzo De Medici Sweat | |
| District: | 1st |
| Term Start: | March 4, 1863 |
| Term End: | March 3, 1865 |
| Predecessor: | John N. Goodwin |
| Successor: | John Lynch |
| Birth Date: | 26 May 1818 |
| Birth Place: | Parsonsfield, Massachusetts (now Maine), U.S. |
| Death Place: | Portland, Maine, U.S. |
| Resting Place: | Evergreen Cemetery |
| Party: | Democratic |
| Spouse: | Margaret Jane Mussey |
| Children: | none |
| Profession: | Attorney |
| Alma Mater: | Bowdoin College Harvard Law School |
Lorenzo De Medici Sweat (May 26, 1818 - July 26, 1898) was a U.S. Representative from Maine.
He was born in the town of Parsonsfield in the Massachusetts District of Maine, where he attended Parsonsfield Seminary, a Free Will Baptist school. Sweat attended Bowdoin College, from which he graduated in 1837, and studied law with Rufus McIntire. He attended Harvard Law School, and after graduating in 1840 he was admitted to the bar and practiced law in New Orleans.[1]
Sweat returned to Maine and settled in Portland, where he continued to practice law. In 1849, he married novelist Margaret Jane Mussey and purchased a home adjoining author and critic, John Neal.[2] The couple did not have children.[3]
Sweat held various local offices including Portland City Solicitor from 1856 to 1860. He served as a member of the Maine State Senate from 1861 to 1862.
He was elected as a Democrat to the Thirty-eighth Congress and served from March 4, 1863, to March 3, 1865. He voted against the Thirteenth Amendment. He was defeated for reelection in 1864, and was an unsuccessful candidate for election to Congress in 1866.
He later was a delegate to the Union National Convention held in Philadelphia in 1868, and to the 1872 Democratic National Convention. In 1872 he was selected as a member of the Democratic National Committee. He served until 1876 and received credit for helping Samuel J. Tilden receive that year's Democratic nomination for president.
He was an honorary commissioner to the World's Exposition in Paris in 1867 and that in Vienna in 1873.
His house in Portland, the McLellan-Sweat Mansion, was later adapted for use as the Portland Museum of Art, following a bequest by his wife. Today it is a National Historic Landmark.
He is interred in Evergreen Cemetery in Portland, Maine.