The Diocese of Nantes is a Roman Catholic diocese located in western France. It covers the city of Nantes and its surrounding areas, serving as a spiritual and administrative center for the Catholic community. The diocese is part of the ecclesiastical province of Rennes and has a rich history dating back to the early Christian era. The diocese is led by a bishop, currently Jean-Paul James, who oversees various parishes and religious activities. It plays a significant role in promoting the Catholic faith, education, and social services within the region. The Cathedral of Saint Peter and Saint Paul in Nantes serves as the diocese's main church.