He was one of the introducers of Surrealism in Portuguese painting, in the late 1930s. Its official start is set to be the exposition he held with António Dacosta and Pamela Boden in Lisbon in 1940.
Pedro paintings show the influence of the great surrealist painters, like Giorgio de Chirico, Max Ernst and Salvador Dalí. He was a founding member of the Portuguese Surrealist Group, in 1947, but he left painting short time after.
He was also a Freemason and an active anti-fascist militant.Wikipedia