The Diocese of Modena is a Roman Catholic diocese located in the region of Emilia-Romagna, Italy. It was established in the 3rd century and is part of the ecclesiastical province of Bologna. The diocese covers the city of Modena and surrounding areas, serving a diverse community of believers. The diocese is known for its rich history and cultural heritage, including the Modena Cathedral, a UNESCO World Heritage site. The current bishop, as of 2023, is Erio Castellucci, who oversees the spiritual and administrative needs of the diocese, promoting faith and community engagement.