The Colegiata de San Isidoro is a historic church located in León, Spain. Built in the Romanesque style during the 11th century, it serves as a significant example of medieval architecture. The church is known for its impressive frescoes and the ornate Royal Pantheon, which houses the remains of several Spanish kings. This site is dedicated to San Isidoro de Sevilla, a prominent figure in the early Christian church. The Colegiata has been a center of religious and cultural life in León for centuries, attracting visitors for its artistic and historical value.