The Houston Astros would play games in the Houston Astrodome, an air-conditioned space that seated around 50,000. The first major event at the Dome occurred on April 9, 1965.

On Wednesday, the Astrodome Conservancy unveiled its ambitious $1 billion plan, Vision: Astrodome, with a mission to answer the decades-long question of what to do with the landmark. Gensler ...