The Minor Basilica of the Immaculate Conception is a Roman Catholic cathedral located in Derek Walcott Square, Castries, Saint Lucia. It serves as the seat of the Diocese of Saint Lucia and is one of the largest churches in the Caribbean. The cathedral offers regular Mass services, sacraments, religious celebrations, and community events. Known for its historic murals and large interior space, it is both a major religious center and a significant cultural landmark in Saint Lucia.