The Visitors is an opera in three acts and a prologue composed by Carlos Chávez to an English-language libretto by the American poet Chester Kallman.

The opera finally premiered with the title Panfilo and Lauretta on 9 May 1957 in the Brander Matthews Theatre at Columbia University, conducted by Howard Shanet.

It was then presented on three occasions in Mexico, conducted by the composer: in October 1959 (in English) in the Palacio de Bellas Artes in Mexico City; in 1963, again at the Palacio de Bellas Artes, but in a Spanish translation by Noel Lindsay and Eduardo Hernández Moncada with the title El amor propiciado (Love Propitiated); and in 1968 with the title of Los Visitantes (The Visitors) as part of the cultural programme for the XIX Olympic Games.

In the succeeding thirty years the opera went unperformed apart from excerpts conducted by Chávez at the Cabrillo Music Festival in Aptos, California, in 1973.

In 1997, his daughter entrusted the manuscript and her father's revisions to the composer and musicologist Max Lifchitz, who within two years had prepared the definitive version of the score.

The world premiere of this version took place in October 1999 (the centenary of Chávez's birth) during the Festival Internacional Cervantino in the Teatro Juárez, Guanajuato City.

Conducted by José Areán with stage direction by Sergio Vela, the opera was performed with its original English libretto and its final title, The Visitors.

Panfilo returns unexpectedly, tells of the horrors he has seen in the city, and berates his companions for living in their isolated villa without knowledge of the death and suffering outside.