Lincoln Memorial University is a private four-year co-educational liberal arts college located in Harrogate, Tennessee. LMU's 1,000-acre (4.0 km) campus borders on Cumberland Gap National Historical Park. LMU is accredited by the Southern Association of Colleges and Schools (SACS). Its Abraham Lincoln Library and Museum houses a large collection of memorabilia relating to the school's namesake, Abraham Lincoln and the Civil War, initially formed from donations by the school's early benefactor, General Oliver O. Howard, and his friends. The collection of Lincoln items is said to be the world's third largest. In the 1880s, an energetic entrepreneur named Alexander Arthur (1846–1912) and several associates established a firm called American Association, Ltd., the primary purpose of which was to develop the iron ore and coal resources of the Cumberland Gap area. Arthur founded Middlesboro, Kentucky for the company's employees and furnaces, and constructed a railroad line connecting Middlesboro with Knoxville, Tennessee. Arthur believed Middlesboro would grow into a large industrial city, the so-called "Pittsburgh of the South.