Simplify the following text for a Grade 8 native English-speaking person.
Original: The original Wembley Stadium , known as the Empire Stadium or Old Wembley , was a football stadium in Wembley , a suburb of north-west London , standing on the site now occupied by the new Wembley Stadium that opened in 2007 .
Simplified: Wembley Stadium was a sports arena located in London , England . It was built in 1923 and was first known as the Empire Stadium , but because the area it was in is named `` Wembley , '' it was renamed `` Wembley Stadium . ''