The club was officially founded in Baltimore, Maryland in 1953, but can trace its history to the Dayton Triangles, a founding member of the NFL that was originally created in 1913. After a series of changes, it assumed the "Baltimore Colts" name, replacing a previous team that folded in 1950. Playing at Baltimore's Memorial Stadium, the Colts became the first NFL team to have cheerleaders. The team then relocated to Indianapolis in 1984, first playing at the Hoosier Dome, which was then renamed the RCA Dome before moving to Lucas Oil Stadium in 2008.
The Colts won four NFL championships (three NFL Championships in 1958, 1959, 1968; and Super Bowl V in 1971) while in Baltimore. Since moving to Indianapolis, they won Super Bowl XLI in 2007. Also since 1998, the team has become the first in league history to win 12 games or more in five consecutive seasons—extending this record to seven after the 2009 season. The team headquarters and practice facilities are also located in Indianapolis.
The Colts franchise was officially created in 1953, but its been debated the franchise can trace its history much earlier than that, to before the NFL actually began as the Dayton Triangles, a founding member of the NFL that was originally created in 1913.
In 1946, the bankrupt Miami Seahawks of the All-America Football Conference (AAFC) were purchased and relocated in Baltimore. As the result of a fan contest in Baltimore, the team was renamed the Baltimore Colts. The AAFC and NFL merged in 1950, and the Colts joined the NFL. However, the franchise folded after one NFL season. After fans in Baltimore protested, the NFL formed another Colts team out of the failed Dallas Texans for the 1953 season. Although debatable from a historical perspective, neither the Colts franchise or the National Football League consider the various incarnations as part of the modern Colts franchise.
While in Baltimore, the club won four NFL Championships, including Super Bowl V. Before the 1984 season, the Colts moved to Indianapolis for a new stadium. They were renamed the Indianapolis Colts, which they remain to this day.