Monticello was the primary plantation of Thomas Jefferson, the third President of the United States, who began designing and building Monticello at age 26 after inheriting land from his father. Located just outside Charlottesville, Virginia, in the Piedmont region, the plantation was originally 5,000 acres (20 km2), with Jefferson using slaves for extensive cultivation of tobacco and mixed crops, later shifting from tobacco cultivation to a wheat in response to changing markets.