Santa María de León Cathedral, also called The House of Light or the Pulchra Leonina is a Catholic church in the city of León in north-western Spain. It is one of the most relevant examples of the Gothic style in Spain. It was built on the site of previous Roman baths of the 2nd century which, 800 years later, king Ordoño II converted into a palace.

Almost all of it built between 1205 - 1301, the north tower and cloister were built in 14th-century, and the south tower completed in 1472.

It is best known for its stained glass windows. With at least 1,764 square meters of surface, most of it containing the original windows, it is one of the most extensive and best preserved collections of medieval stained glass in Europe.