"On écrit sur les murs" (English: "We Write on the Walls") is a 1989 song by Greek singer Demis Roussos from the album Voice and Vision.

Written by Romano Musumarra and Jean-Marie Moreau, it was released as first single from the album in January 1990 and achieved success in France where it peaked at number four.

Elia Habib, an expert of French chart, gave a positive review of the song, stating that Musumarra "here confirms his know-how for simple and greatly catchy melodies"; he also adds that lyrically, "Roussos sings hope in an idealistic breath that the chorus powerfully conveys", as the latter is performed by a choir performs "a utopian spirit that the bridge orchestration amplifies".

[1] In France, "On écrit sur les murs" can be considered as a sleeper hit, as it debuted at number 50 on the chart edition of 20 January 1990.

Les Enfoirés adapted the song twice: first in 2008, and was sung by Bénabar and Maxime Le Forestier with Francis Cabrel, Gérald de Palmas, Elsa Delétang, Patrick Fiori, (Garou, David Hallyday, Catherine Lara and Christophe Maé, then in 2017 with Tal, Soprano, Grégoire, Amir, Michaël Youn, Laure Pester, Jeff Panacloc, Liane Foly, Jean-Baptiste Maunier, Bénabar and Claire Keim as singers.