Christian Constantine (born 7 January 1957) is a Swiss architect.^[1] He is the owner and president of Swiss football club FC Sion.^[2] He bought the club, which had previously neared bankruptcy and was relegated from the Swiss Super League, in 2003.^[1]

During his ownership of FC Sion, Constantine has made 50 managerial changes, appointed himself as manager in 2008 and 2021, fired a former head coach because of his smell, allegedly kicked a referee in 2007 forcing the referee to retire three months later, before then kicking and taking down a Swiss pundit live on TV. More recently, and he fired a manager at the half time break before forcing that head coach to stand on the sidelines, even though he didn’t have a job, and confronted Mario Balotelli when he found out he wasn’t pleased with the decision, signed six players under a transfer ban because of what happened with Essam El-Hadary’s transfer,^[3] and even appeared on live TV on a horse. Yet under his presidency, the club also experienced considerable success, such as its Swiss Cup titles in 2006, 2009, 2011 and 2015.

Constantine was formerly a goalkeeper who played for Neuchâtel Xamax (1977–1979), FC Lugano (1979–1980), FC Monthey (1981–1982) and FC Martigny-Sports (1983–1984).^[4]

On 12 October 2017, Constantine was given a 14-month ban for striking former Switzerland coach Rolf Fringer.^[5]

In March 2020, Constantine sacked 9 of his FC Sion first-team players after they refused to take a pay cut after the outbreak of the COVID-19 and suspension of the Swiss Super League.^[6]