The Colosseum or Roman Coliseum, originally the Flavian Amphitheatre, is an elliptical amphitheatre in the center of the city of Rome, Italy, the largest ever built in the Roman Empire. The Colosseum was designed to hold 50,000 spectators, and it had approximately eighty entrances so crowds could arrive and leave easily and quickly.The Colosseum hosted spectacular games that included gladiator exhibitions, fights between animals, prisoner executions and  strangely enough - naval battles. It is one of the greatest works of Roman architecture and Roman engineering.

                                                           The Leaning Tower of Pisa

The Tower of Pisa is the bell tower of the Cathedral. It is the third oldest structure in Pisa's Piazza del Duomo (Cathedral Square) after the cathedral and the baptistry. In the past it was widely believed that the inclination of the Tower was part of the project ever since its beginning, but now we know that it is not so. The Tower was designed to be "vertical" (and even if it did not lean it would still be one of the most remarkable bell towers in Europe), and started to incline during its construction. Both because of its inclination, and its beauty, from 1173 up to the present the Tower has been the object of very special attention.

                                            The Pantheon

The Pantheon, meaning "Temple of all the gods" is a building in Rome which was originally built as a temple to all the gods of Ancient Rome, and rebuilt circa 125 AD during Hadrian's reign. It is the best preserved of all Roman buildings, and perhaps the best preserved building of its age in the world.