The Open Championship, often referred to simply as the Open, is one of the four major championships in professional golf. Established in 1860, it is the oldest golf tournament in the world and is organized by the R&A. The event is held annually in the United Kingdom, typically in July, and features a field of both professional and amateur golfers competing for the prestigious Claret Jug. The tournament is known for its challenging links courses, which often include unpredictable weather conditions. Players from around the globe participate, with notable champions including Tiger Woods, Jack Nicklaus, and Tom Watson. The Open Championship is a key event in the golfing calendar, attracting significant media attention and large crowds.