The Basilica of Santa Euphemia was built during the thirteenth century, and then rebuilt at the end of the fifteenth century. It is located between the ports of Bermio, and is known as the "Church of the Harbor", and visitors can see examples of Gothic architectural style, especially when looking at the windows, doors and roof with The vaulted ribs, and next to the church is the tomb of the Mendoza family, which was built in the era of the boom of Gothic architecture, and in 1995, the church was declared an Artistic Historic Landmark.