Construction on the park began in 1996, and was finished just before the Diamondbacks' first season began, in 1998. It was the third MLB stadium to have a retractable roof and the first in the United States (at the time, only Toronto's SkyDome (now known as Rogers Centre) and Montreal's Olympic Stadium had them; others are now at Minute Maid Park in Houston, American Family Field in Milwaukee, T-Mobile Park in Seattle, and Marlins Park in Miami). It was also the first ballpark to feature natural grass in a retractable roof stadium.