In addition, since the 1st century AD, Rome has been considered the seat of the Papacy and it became the capital of the Papal States in the 8th century. The city’s architecture is very beautiful and it has been created by famous artists like Bramante, Bernini, Raphael and Michelangelo. The city’s center has been declared a UNESCO World Heritage Site and it features monuments and museums such as the Vatican Museum or the Colosseum.