Greensboro (i/rinzbro/) (formerly Greensborough) is a city in the U.S. state of North Carolina. It is the third-largest city by population in North Carolina and the county seat and largest city in Guilford County and the surrounding Piedmont Triad metropolitan region. According to the 2012 U.S. Census Estimate, Greensboro's population is 277,080. Three major interstate highways (Interstate 85, Interstate 40 and Interstate 73) in the Piedmont region of central North Carolina were built to intersect at this city. In 1808, Greensborough (the spelling before 1895) was planned around a central courthouse square to succeed Guilford Court House as the county seat. This county courts were thus placed closer to the geographical center of the county, a location more easily reached at the time by the majority of the county's citizens, who depended on horse and foot for travel. In 2003, the previous Greensboro Winston-Salem High Pointmetropolitan statistical area (MSA) was re-defined by the U.S. Office of Management and Budget. This region was separated into the Greensboro-High Point MSA and the Winston-Salem MSA. The 2010 population for the Greensboro-High Point MSA was 723,801. The combined statistical area (CSA) of GreensboroWinston-SalemHigh Point, popularly referred to as the Piedmont Triad, had a population of 1,599,477. Among Greensboro's many notable attractions, some of the most popular include the Wet 'n Wild Emerald Pointe water park, the Greensboro Science Center, the International Civil Rights Center and Museum, the Weatherspoon Art Museum, the Greensboro Symphony, the Greensboro Ballet, Triad Stage, the Wyndham Golf Championship, the headquarters of the Atlantic Coast Conference, the Greensboro Coliseum Complex which hosts various sporting events, concerts, and other events, the Greensboro Grasshoppers of the South Atlantic Baseball League, the Carolina Dynamo of the Premier Development Soccer League, the Gate City FC of the National Premier Soccer League, the Greensboro Swarm of the NBA Development League, the Greensboro Roller Derby, and the National Folk Festival.