Portuguese Grand Prix

The Portuguese Grand Prix ("Grande Prémio de Portugal") was a motor racing event held for several years, starting in the 1950s. It was a Formula One race between and and between and .
The first event was held on the Boavista street course in Porto on 17 June 1951. The Grand Prix was moved to Monsanto Park, Lisbon, in 1954 as a one time event. The first Formula One race was held in 14 August 1958. The first three F1 races were held in both Boavista and Monsanto. 1960 was the last Formula One race for more than 20 years.
The Portuguese Grand Prix returned to the calendar in 1984 to the Autódromo do Estoril in 1984. After the deaths of Ayrton Senna and Roland Ratzenberger at Imola in 1994, the Estoril track was changed. A new chicane was built in place of the tank curve, as a safety measure. But Estoril was considered an unsafe and outdated track. The last Portuguese Grand Prix was in Estoril on 22 September 1996.