150 years ago: The Vienna Chess Tournament 1873
150 years ago, from 21 June to 29 August 1873, the “First International Vienna Chess Congress” was held in Vienna. Some of the best players in the world accepted the invitation and played mini-matches against each other. In the end, Wilhelm Steinitz and Joseph Blackburne tied for first place. A play-off match decided the tournament’s winner.
Source: chessbase.com