His first three championships were won for McLaren in 1985, 1986 and 1989. After competing for Ferrari in 1990 and just missing out on the 1990 championship, the 1991 campaign went win-less for Prost. He took a sabbatical in 1992, and returned with Williams in 1993.
The team from Grove had dominated Formula 1 in 1992, and Prost went on to win his fourth title with a dominant campaign, winning seven races and recording 12 podiums in 16 races.
— Williams Racing (@WilliamsRacing) May 9, 2016
He retired with his fourth title and with the then F1 record of 51 career victories.
In the picture, there is a Bell helmet that Prost never wore during a race. Let us know why in the comments.