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.
Spartan Stadium (East Lansing, Michigan) Spartan Stadium (formerly College Field, Macklin Field and Macklin Stadium) opened in 1923 in East Lansing, Michigan, United States. It is primarily used for football, and is the home field of the Michigan State University Spartans. After the addition of luxury boxes and club seating in 2004–2005, the capacity of the stadium grew from 72,027 to 75,005—though it has held more than 80,000 fans—making it the Big Ten's sixth largest stadium.