During the Conflict of Investitures in 1108, the chapter became divided: the majority elected Riquin of Commercy as bishop; the minority chose Conrad of Schwarzenburg.

In 1597 Charles III, duke of Lorraine asked Pope Clement VIII for the dismemberment of the See of Toul and the creation of a see at Nancy; this failed through the opposition of Arnaud d'Ossat, Henry's ambassador at Rome.

The Concordat of 1802, suppressing Toul, made Nancy the seat of a vast diocese which included three Departments: Meurthe, Meuse, and Vosges.

The Civil Constitution mandated that bishops be elected by the citizens of each 'département', which immediately raised the most severe canonical questions, since the electors did not need to be Catholics and the approval of the Pope was not only not required, but actually forbidden.

The legitimate bishop of Nancy, Anne Louis Henri de La Fare, refused to take the oath, and therefore the episcopal seat was declared vacant.

[10] The electors therefore returned to their deliberations, and, on the recommendation of the Ecclesiastical Committee of the National Assembly, on 8 May 1791 chose the Oratorian Luc-François Lalande of Saint-Lô, a theologian and student of Hebrew.

On 3 June he made his official entry into Nancy, where he began a war of pamphlets with Bishop de la Fare, who was in exile in Trier.

[12] Nicolas, and all the Constitutional Bishops, were required to resign in May 1801 by First Consul Bonaparte, who was negotiating a treaty with Pope Pius VII, the Concordat of 1801 (15 July 1801).

[13] The Concordat of 1802, suppressing Toul, made Nancy the seat of a vast diocese which included three Departments: Meurthe, Meuse, and Vosges.