Lemuel Pratt Grant was an American engineer and businessman. He was Atlanta's quintessential railroad man as well as a major landowner and civic leader. In railroads he served as a laborer, chief engineer, speculator and executive all over the South. As part of his speculation, he owned enormous tracts of land in strategic areas. For example, at one point he owned more than 600 acres in what is now Atlanta. He designed and built Atlanta's defenses during the American Civil War and afterwards became an important civic leader: donating the land for Grant Park, Atlanta's first large park, and serving as councilman and on various boards and committees. His mansion is one of only four remaining original antebellum houses in the city of Atlanta.