In modern French, the worddeuil means mourning. That is not, however, the derivation of this commune's name. The word is in fact Celtic, a combination of divo and ialo Historical citations include the toponyms DiogilumDoguillum, Diogilo and Villam Dueil Originally called simply Deuil in modern times, the name of the commune became officially Deuil-la-Barre on 7 December 1952. Barre here has the sense of a barrier or enclosure. The demonym is Deuillois.
The school at 2, Rue Jean Bouin is called The Cornet School after its founder Maurice Cornet. With a staff of around 30, the school offers a comprehensive education in many musical instruments and music styles. The telephone number is +33 1 39 84 03 64 and the e-mail address ecole-musique@mairie.deuillabarre.fr.
Library
The municipal library at 38, Rue Soeur Azélie is a meeting place and a place for study, open to the general public. More than 30,000 reference sources are available. Services include loans, internet access, and photocopying. Subscription is free to children and registered students. The telephone number is +33 1 39 84 98 40 and the e-mail address bibliotheque@deuillabarre.fr.
Museum
The town museum was established in 1984 by Michel Bourlet, a local historian. It shares premises with the school of music, both of which occupy the old keeper's lodge of the Château de La Chevrette. After refurbishment in 2012, the museum today presents a permanent exhibition organised around three central themes: religious life, land ownership, and economic/sociological development. The aim is to offer visitors a synoptic view of 2,000 years of significant events in the region's history. The telephone number is +33 1 34 28 66 12.
C2i
C2i at 35, Rue Abel Fauveau is a public space dedicated to new technologies. It is an educational resource open to the general public, offering performances, exhibitions and film screenings. Nine computer workstations are available. C2i has something to offer everyone: elementary and high school pupils, college students, seniors, the handicapped, job seekers and associations. It is divided into two multimedia labs, an audiovisual auditorium and a general meeting hall. The telephone number is +33 1 30 10 00 50 and the e-mail address c2i@deuillabarre.fr.
Festival hall
Deuil-la-Barre has a large hall of festivities on the Rue Schaeffer, which attracts thousands of spectators every year with a notably wide spectrum of activities: concerts, theatre, expositions, and happenings in the life of the township.