From Research, Im not 100% sure its the first, but the oldest is Bramall Lane, Sheffield, England. You my want to double check this but I'm quite sure its the first, as it opened in 1855 as a cricket ground.
The oldest football grounds in the world used to be the Drill Field located in Northwich, Cheshire, England. They were the home grounds of Northwich Victorica Football Club from 1874 until they were demolished in 2002. They were regarded as the oldest by the Football Association.
http://www.independent.co.uk/sport/football/football-league/the-last-post-sounds-for-drill-field-637442.html
It was called the Houston Astrodome
Yes, Minute Maid Park is Houston's first retractable roofed stadium.
A stadium is a wide open space used for various activities (e.g. sports, concerts, etc.) enclosed by tiered seating for spectators. Stadiums may be open-air or roofed.
Yankee Stadium was the name of the first stadium as well as the current stadium.
Indian roofed turtle was created in 1831.
Brown roofed turtle was created in 1863.
a roofed arcade or balcony is called a loggia.
The first Yankee Stadium opened in 1923.
Lanai
The first stadium the Cowboys played in was the Cotton Bowl.
The retractable roof was open for the first Super Bowl in Reliant Stadium.
Metropolitan Stadium