The Diocese of Gap and Embrun (Latin: Dioecesis Vapincensis et Ebrodunensis; French: Diocèse de Gap et d'Embrun) is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Provence-Alpes-Côte d'Azur region of Southern France.

[2] Ancient traditions in liturgical books, of which at least one dates from the fourteenth century, state that the first Bishop of Gap was St. Demetrius, disciple of the Apostles and martyrs.

[3] Victor de Buck in the Acta Sanctorum [4] finds nothing inadmissible in these traditions,[5] while Canon Albanès defends them[6] against Joseph Roman.

In 890, the bishops of Provence assembled in the Council of Valence, under the leadership of the archbishops of Lyon, Arles, Embrun, and Vienne.

The bishops took note of the fact that Archbishop Bernoin of Vienne had been to Rome to complain to the pope of the increasing disorder of the kingdom since the death of Charlemagne.

[10] On 7 July 1057, Pope Victor II wrote a letter of privileges for Archbishop Winimann (Viminien) of Embrun, whom he had consecrated and to whom he had given the pallium.

In 1562, however, the Protestant armies defeated and killed La Motte Gondrin, and on 1 May they attacked and took control of Gap.

In 1568 however, bands of Protestant soldiers, encouraged by the successes of the armies of the Prince de Condé, engaged in battle at Gap and massacred more than one hundred Catholics whom they trapped inside the city.

Ignace de Cazeneuve, a Canon of the Cathedral Chapter of Gap, was elected by special Electors in March 1791, and was consecrated in Paris on 3 April by Constitutional Bishop Jean-Baptiste Gobel.

André Garnier was named bishop in succession to Cazeneuve by the Metropolitan, Jean-Baptiste-Siméon Aubert, and was consecrated in Aix on 19 January 1800.

In 1799, Pope Pius VI, made a prisoner by order of the Directory, was being transported from Florence to Valence, he passed through Gap on 29 June and bestowed his blessing on the crowds which had gathered to see him.

In the Bull Qui Christi Domini of 29 November 1801,[21] the departments of Hautes-Alpes and of Basses-Alpes were united in a single diocese with its seat at Digne.

[23] The diocese of Gap was re-established at least in theory by the Concordat of 1817 between King Louis XVIII and Pope Pius VII, but its implementation was delayed by the refusal of the Chamber of Deputies to ratify the treaty.

In 2008, the title was reattached to the Diocese of Gap by a decision of the Congregation of Bishops, conveyed in a letter of Cardinal Giovanni Battista Ré, the Prefect.

The Cathedral of the Assumption of Notre-Dame was served by a chapter composed of four dignities (dignités; not dignitaries): the dean, the archdeacon, the provost, and the sacristan.