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.
Autzen Stadium Autzen Stadium is an outdoor football stadium in the northwest United States, in Eugene, Oregon. Located north of the University of Oregon campus, it is the home field of the Oregon Ducks of the Pac-12 Conference. Opened in 1967, the stadium has undergone several expansions. The official capacity is 54,000. However, attendance at the stadium regularly exceeds 54,000.