Construction works for Peñafiel Castle commenced in the 10th century, although the contemporary structure underwent major interventions during the 14th and 15th centuries. This medieval fortress was declared a National Monument in 1917 and currently stands as a veritable emblem of wine tourism in Ribera del Duero.
Peñafiel and its castle were key defensive locations along river Duero, both for Christians and Muslims in the 9th and 10thcenturies. Sitting atop the hill, the castle controlled the valleys of rivers Duero, Duratón and Botijas, and protected the population.
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.