The Silverdome refers to the stadium that opened in what year?
Pontiac Silverdome The Pontiac Silverdome, formerly known as the Silverdome, is a stadium in Pontiac, Michigan, United States, which is a suburb of Detroit. It opened in 1975 and sits on 127 acre of land. When the stadium opened, it featured a fiberglass fabric roof held up by air pressure, the first use of the technique in a major athletic facility. The roof has since been destroyed. With a seating capacity of 82,000, it was the largest stadium in the National Football League (NFL) until FedExField (91,000 capacity) in suburban Washington, D.C., opened in 1997.
Baltimore Colts relocation to Indianapolis The Baltimore Colts relocation to Indianapolis was a successful effort by the then-owner of the Baltimore Colts (Robert Irsay) to move the American football team from Baltimore, Maryland to Indianapolis, Indiana. The team began play as the Indianapolis Colts for the 1984 National Football League (NFL) season. The Colts' move was completely unannounced and occurred in the early hours of March 29, 1984, after years of lobbying for a new stadium to replace the inadequate Memorial Stadium. The franchise's move continues to embitter many Baltimore natives decades afterward, and would have a lasting impact on the NFL, including another controversial relocation twelve years later that resulted in Baltimore receiving its current NFL team, the Ravens.