This 3rd-cen­­tu­ry mon­u­ment served as a venue for glad­i­a­tor fights and pub­lic spec­ta­cles. Entire­ly con­struct­ed from stone blocks with­out foun­da­tions, it stands as an archi­tec­tur­al mar­vel. In the Mid­dle Ages, it was used as a fortress, and lat­er as stor­age and hous­ing. Its dimen­sions are 148 by 122 meters, with a capac­i­ty of around 35,000 spec­ta­tors.