The Basilica of Our Lady of the Pillar is a prominent Roman Catholic church located in Zaragoza, Spain. It is dedicated to the Virgin Mary, specifically under the title of Our Lady of the Pillar, who is believed to have appeared to the Apostle James in the 1st century. The basilica is an important pilgrimage site and features stunning Baroque architecture. Construction of the basilica began in the late 17th century and continued into the 18th century. Its striking façade and interior are adorned with beautiful frescoes by the artist Francisco Goya. The basilica is also recognized as a minor basilica and is a UNESCO World Heritage site.