Tout un monde lointain... (A whole distant world...) is a concertante work for cello and orchestra composed by Henri Dutilleux between 1967 and 1970 for Mstislav Rostropovich.

[4] Despite the fact that the score does not state that it is a cello concerto, Tout un monde lointain... has always been considered as such.

Since Markevitch had left the Concerts Lamoureux in 1961, Rostropovich was accompanied for the premiere by the Orchestre de Paris, conducted by Serge Baudo, at the Festival d'Aix-en-Provence (25 July 1970).

In addition to the solo cello part, the concerto is scored for two flutes, piccolo, two oboes, two clarinets, bass clarinet, two bassoons, contrabassoon, three horns, two trumpets, two trombones, tuba, celesta, harp, timpani, percussion (bongos, tom-toms, snare drum, bass drum, crotales, triangle, suspended cymbals, cymbals, gongs, tam-tams, xylophone, marimba, and glockenspiel), and strings.

The piece has five movements, each bearing a title and a quotation from a poem from Les fleurs du mal, by Charles Baudelaire.