The Greek theatre of Syracuse lies on the south slopes of the Temenite hill, overlooking the modern city of Syracuse. It was first built in the 5th century BC, rebuilt in the 3rd century BC and renovated again in the Roman period. Today, it is a part of the Unesco World Heritage Site of 'Syracuse and the Rocky Necropolis of Pantalica'.
It seems that the theatre was renovated in the third century, transforming it into the form seen today. Its structure was extended, taking into account the shape of the Temenite hill and the best possibilities for acoustics. Another typical characteristic of Greek theatres is the celebration of the panoramic view, also applied to the theatre of Syracuse, offering a view of the bay of the port and the island of Ortygia.
During the Roman era, important modifications were made to the theatre, perhaps at the time when the colonia was founded in the early Augustan period. The cavea was modified to a semicircular form, typical of Roman theatres, rather than the horseshoe used in Greek theatres and corridors allowing access past the scene building (parodoi). The scene building itself was reconstructed in monumental form with rectangular niches at centre and two niches with a semicircular plan on the sides, containing doors to the scene.
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.