The Colegiata de Santa Juliana is a historic church located in the town of Santillana del Mar, Spain. Built in the Romanesque style during the 12th century, it is dedicated to Saint Juliana, the patron saint of the town. The church features intricate stone carvings and a beautiful cloister, making it a significant example of medieval architecture. This site was originally part of a monastery and served as a center for religious life in the region. The Colegiata is known for its impressive altarpiece and well-preserved interior, attracting visitors interested in history and architecture.