Catherine de Gonzague de Nevers (21 January 1568–1 December 1629), French Duchess of Longueville, was the wife of Henri I of Orléans-Longueville and took over as the regent of Neuchâtel (now part of Switzerland) for 16 years during her son's (the heir's) early years.
During Catherine's lifetime she held several official titles, such as Caterine of Gonzague de Cleves, Duchess of Longueville and Toutville.
The Council of State of Neuchâtel permitted Catherine to build a church there, which was consecrated on 2 December 1604.
[3] In 1613, Catherine founded the Notre-Dame de Grace priory on the territory of Ville l'Évêque near Paris, and in 1615 she sought out a relative, Louise de Pierrevive, a novice at the abbey Saint-Avit-les-Guêpières in the Loire Valley, to assist in its foundation.
[3] Catherine died at 61 in Paris on 1 December 1629 and was buried in the cloister of the Carmelite Monastery that she had founded.