The Boston Celtics have won a total of 17 NBA championships, which is the most by any team in the league. The Celtics have a rich history of success in the NBA, dating back to the 1950s and 1960s when they won 11 championships in 13 seasons.

The Celtics' first championship came in 1957, led by Hall of Famers Bill Russell and Bob Cousy. They won eight more championships in the 1960s, including a stretch of eight consecutive titles from 1959-1966. Russell, who played center for the Celtics during this era, is widely considered one of the greatest players in NBA history and was the backbone of the Celtics' championship runs.

The Celtics won two more championships in the 1970s, led by Hall of Famers Dave Cowens and John Havlicek. They won another championship in 1981, led by Hall of Famer Larry Bird, who is also considered one of the greatest players in NBA history. Bird helped lead the Celtics to two more championships in the 1980s, in 1984 and 1986.

The Celtics won their most recent championship in 2008, led by a new generation of stars including Kevin Garnett, Paul Pierce, and Ray Allen. The team defeated the Los Angeles Lakers in the NBA Finals to win their 17th championship.

Overall, the Celtics have a storied history of success in the NBA, with 17 championships and numerous Hall of Fame players and coaches. Their success has made them one of the most iconic franchises in sports history.