Quarteto 1111

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Quarteto 1111 was a Portuguese progressive rock and psychedelic rock band founded in Estoril in 1967. Originally it was formed by Miguel Artur da Silveira (drums), José Cid (vocals and keyboard), António Moniz Pereira (guitar) and Jorge Moniz Pereira (bass). Later members included Tozé Brito, Mike Sergeant and Mário Rui Terra.^[1] It was one of the most influential rock bands in the country.^{[citation needed]}

It was one of the many musical groups inspired by The Shadows. Originally called Conjunto Mistério (lit. "mystery group"), the name later changed to Quarteto 1111 ("1111 quartet"). The name was inspired by the phone number of the band's rehearsal place, at the drummer's house.

José Cid was the band leader, composer, keyboard player and lead singer. The rest of the band had a classic formation influenced by the usual Beatles line-up, but with a sound and song structure reminiscent of the early Moody Blues.