St. Michael of Lillo is a Roman Catholic church built on the Naranco mount, near the Church of Santa María del Naranco. It was completed in 842 and it was consecrated by Ramiro I of Asturias and his wife Paterna in the year 848. It was originally dedicated to St. Mary until this worship passed to the nearby palace in the 12th century, leaving this church dedicated to Saint Michael. It has been a UNESCO World Heritage Site since 1985.
It originally had a basilica ground plan, three aisles with a barrel vault, although part of the original structure has disappeared as the building collapsed during the 12th or 13th century. Nowadays, it conserves its western half from that period, together with several elements in the rest of the church such as the fantastic jambs in the vestibule or the extraordinary lattice on the window of the southern wall, sculpted from one single piece of stone.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.