Since September of 1971 the Chicago Bears have called Soldier Field home. This came after George Halas was informed by the recently merged NFL that all stadiums must have a minimum seating capacity of at least 60,000 to be considered a home venue. Prior to this, the Bears played all their home games at Wrigley Field, which had a considerably smaller capacity.
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Interestingly enough, Soldier Field used to be the host for the then-Chicago Cardinals in 1959. In 1960 the football Cardinals moved elsewhere.