Santiago Cathedral is a Roman Catholic church in Bilbao, and its origins date back to before the founding of the city in the year 1300, and therefore it is the oldest church in it, and was dedicated in honor of the Apostle Saint James, by virtue of being a transit point for pilgrims who followed the northern path, and is characterized by the Gothic design that It stands out in many of its architectural details, such as the ancient arches and columns.