<P> In 1816, the year Indiana gained statehood, the U.S. Congress donated four sections of federal land to establish a permanent seat of state government . Two years later, under the Treaty of St. Mary's (1818), the Delaware relinquished title to their tribal lands in central Indiana, agreeing to leave the area by 1821 . This tract of land, which was called the New Purchase, included the site selected for the new state capital in 1820 . </P> <P> The availability of new federal lands for purchase in central Indiana attracted settlers, many of them descendants of families from northwestern Europe . Although many of these first European and American setters were Protestants, a large proportion of the early Irish and German immigrants were Catholics . Few African Americans lived in central Indiana before 1840 . The first European Americans to permanently settle in the area that became Indianapolis were either the McCormick or Pogue families . The McCormicks are generally considered to be the first permanent settlers; however, some historians believe George Pogue and family may have arrived first, on March 2, 1819, and settled in a log cabin along the creek that was later called Pogue's Run . Other historians have argued as early as 1822 that John Wesley McCormick, his family, and employees became the first European American settlers in the area, settling near the White River in February 1820 . </P> <P> On January 11, 1820, the Indiana General Assembly authorized a committee to select a site in central Indiana for the new state capital . The state legislature approved the site, adopting the name Indianapolis on January 6, 1821 . In April, Alexander Ralston and Elias Pym Fordham were appointed to survey and design a town plan for the new settlement . Indianapolis became a seat of county government on December 31, 1821, when Marion County, was established . A combined county and town government continued until 1832 when Indianapolis incorporated as a town . Indianapolis became an incorporated city effective March 30, 1847 . Samuel Henderson, the city's first mayor, led the new city government, which included a seven - member city council . In 1853, voters approved a new city charter that provided for an elected mayor and a fourteen - member city council . The city charter continued to be revised as Indianapolis expanded . Effective January 1, 1825, the seat of state government relocated to Indianapolis from Corydon, Indiana . In addition to state government offices, a U.S. district court was established at Indianapolis in 1825 . </P> <P> Growth occurred with the opening of the National Road through the town in 1827, the first major federally funded highway in the United States . A small segment of the ultimately failed Indiana Central Canal was opened in 1839 . The first railroad to serve Indianapolis, the Jeffersonville, Madison and Indianapolis Railroad, began operation in 1847, and subsequent railroad connections fostered growth . Indianapolis Union Station was the first of its kind in the world when it opened in 1853 . </P>

When did indianapolis become the capital of indiana