Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Sheffield Wednesday Football Club is a professional Association football club based in Sheffield, South Yorkshire, England, who currently compete in the Football League Championship, in England. Sheffield Wednesday is one of the oldest professional clubs in the world and the fifth oldest in the English league. The Wednesday, as they were named until 1929, were founding members of The Football Alliance in 1889, and its first champions that inaugural season. The Wednesday joined The Football League three years later when the leagues merged. Sheffield Wednesday were also one of the founding members of The Premier League in 1992. Their main rivals are Sheffield United, the two clubs have contested the Steel City derby on a regular basis for some 100 years. Barnsley, Leeds United, and Rotherham United and Doncaster are also rivals.