The Circuito do Estoril or Autódromo do Estoril (Estoril Circuit), officially known as Autódromo Fernanda Pires da Silva, is a motorsport race track on the Portuguese Riviera, outside of Lisbon, owned by state-run holding management company Parpública. Its length is 4.182 km (2.599 mi). It was the home of the Formula One Portuguese Grand Prix from 1984 to 1996. The capacity of the motorsport stadium is 45,000.[1] The circuit has an FIA Grade 1 license.