Marshall is also referred to by various nicknames; the Cultural Capital of East Texas, the Gateway of Texas, the Athens of Texas the City of Seven Flags and Center Stage, a branding slogan adopted by the Marshall Convention and Visitors Bureau. Marshall is a city in Harrison County in the northeastern corner of Texas. Marshall is a major cultural and educational center in East Texas and the tri-state area. As of the 2000 U.S. Census, the population of Marshall was about 23,935. The city is the county seat of Harrison County. Marshall was a political and production center of the Confederacy during the Civil War and was a major railroad center of the T&P Railroad from the late 19th century until the mid-20th century. The city's large African American population and the presence of black institutions of higher learning made Marshall a center of the civil rights movement in the American South.