Writers and artists such as Miguel de Unamuno, Alfonso Reyes, Manuel de Falla, Juan Ramón Jiménez, José Ortega y Gasset, Pedro Salinas, Blas Cabrera, Eugenio d´Ors and Rafael Alberti were frequent visitors and lodged at the Residencia during their stay in Madrid.
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In 1996, along with Mexico's Octavio Paz, Spain's Rafael Alberti, and Nicaragua's Ernesto Cardenal, he was one of 50 intellectuals awarded the Gabriela Mistral Medal by the government of Chile.
Serrat's lyrical style has been influenced by other poets such as Mario Benedetti, Antonio Machado, Miguel Hernández, Rafael Alberti, Federico García Lorca, Pablo Neruda, and León Felipe.
Whilst in exile he composed the instrumental music pieces: “Susurro” and "El paso del ñandu", plus he also composed music for Pablo Neruda's poem "El arbol de los libres" and for Rafael Alberti's "La primavera".