The Roman circus of Mérida was used for chariot racing. It was modelled on the Circus Maximus in Rome and other circus buildings throughout the Empire. Measuring more than 400 m in length and 30 m of width, it is one of the best preserved examples of Roman circus. It could house up to 30,000 spectators.
There is no consensus about the circus' dating, as it was built and used for several years before its official dedication. It seems to have been built sometime around 20 BC and inaugurated some 30 years later. It was located far outside the city walls, but close to the road that connected the city to Toledo and Córdoba.
After the fall of the Western Roman Empire and the rise of Christianity in Spain, the circus saw more use than the other Roman structures of Mérida, since racing was considered less sinful than spectacles performed in the Theatre and the Amphitheatre.
Mérida's circus remains very well preserved with numerous structures, including the Porta Pompae ('main entrance'), the Porta Triumphalis ('triumph gate'), the spina (the longitudinal wall), the tribunal iudicium ('tribune of the judges'). A museum dedicated to the circus now sits near the middle edge of the circus grounds and it allows admittance into the fenced area around the circus remains.
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.