The Old Firm is a term used to describe the rivalry between the two biggest football clubs in Scotland, Rangers Football Club and Celtic Football Club. This rivalry has been around since the late 19th century and is one of the most intense and passionate rivalries in world football. The Old Firm rivalry has been a source of great passion and excitement for Scottish football fans for over a century. The two clubs have a long history of intense competition and the matches between them are always highly anticipated. The atmosphere at the games is electric, with both sets of fans singing and chanting in support of their team. The Old Firm rivalry has had a huge impact on Scottish football and culture. The matches between the two clubs are often seen as a symbol of the divide between the Protestant and Catholic communities in Scotland. The rivalry has also been the source of much controversy, with sectarianism, violence and hooliganism being a major problem at some of the games. The Old Firm rivalry is an important part of Scottish football and culture, and is a rivalry that has been around for over a century and is still going strong. The matches between the two clubs are always highly anticipated and the atmosphere is electric. The Old Firm rivalry is a unique and passionate part of Scottish football and culture that will continue to be a source of great excitement and passion for many years to come.