The Boston Celtics (/ˈsɛltɪks/) are an American professional basketball team based in Boston, Massachusetts. The Celtics compete in the National Basketball Association (NBA) as a member club of the league's Eastern Conference Atlantic Division. Founded in 1946 and one of eight NBA teams (out of 23 total teams) to survive the league's first decade, the team is owned by Boston Basketball Partners LLC. The Celtics play their home games at the TD Garden, which they share with the National Hockey League (NHL)'s Boston Bruins. The franchise's 17 championships are the most of any NBA franchise, and account for 24.6% of all NBA championships since the league's founding in 1946.As a percentage of championships won, the Celtics are the most successful franchise to date in the major four traditional North American professional sports leagues.