When was the third stadium used by the football team for the Portuguese sports club in Porto demolished?
Estádio das Antas: The Estádio das Antas (officially Estádio do Futebol Clube do Porto) was the third (and longest occupied) stadium of the Portuguese football side FC Porto. Estádio das Antas:  It was demolished in 2004 although one floodlight still remains and the majority of the site is not yet redeveloped. FC Porto: Futebol Clube do Porto, (] ), commonly known as FC Porto or simply Porto, is a Portuguese sports club based in Porto.
2004