The monastic community founded by St Millán in the
mid-6th century became a place of pilgrimage. A fine Romanesque church
built in honour of the holy man still stands at the site of Suso. It was
here that the first literature was produced in Castilian, from which
one of the most widely spoken languages in the world today is derived.
In the early 16th century the community was housed in the fine new
monastery of Yuso, below the older complex; it is still a thriving