Puertas de Tierra is a bastion-monument built around remnants of the old defensive wall at the entrance to the city of Cadiz. Built by academic architect Torcuato Cayón in the 18th century, the cover is carved in marble and was intended more as a religious altarpiece than as a military fortification.
It is one of the most significant monuments of the city and on its walls flies the purple flag of its canton.
The adjustment to the new architecture of the city, opening the two new arcs, is performed by the architect Antonio Sánchez Esteve.
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.