It was founded, c.884, and reached its highest importance in the 15th century.
In 1808 it was the scene of the defeat of the Spanish army by the French.
Several councils have been held there from the 11th to the 19th centuries.
It is the seat of an archbishop.
Buildings of Catholic interest include the cathedral, founded, 1221, the churches of Santa Agueda, San Esteban, and San Nicolas, and in the vicinity, the 12th century convent of Santa Maria de las Huelgas and the Carthusian monastery of Miraflores.
New Catholic Dictionary