They were purely decorative, and were richly decorated with horizontal entablatures and vertical arches, pilasters. Niches, entablatures, pediments and wall reliefs created dynamics within the space. The interior spaces are framed by arches, entablatures, and pilasters. The architecture style is marked by the use of columns, entablatures and pediments. Like the central building, the wings use Doric colonnades and entablatures. During the Renaissance, architects aimed to use columns, pilasters, and entablatures as an integrated system. The columns support entablatures that include classical balustrades. The intense heat cracked many marble elements, including entablatures and consequently metopes. The entrances are emphasised by stylised columns, capitals and entablatures with balconies above. It is walled by a colonnade joined by entablatures and capped with rounded arches. It is three bays wide with fluted Ionic columns carrying richly detailed entablatures. The entablatures serve as imposts supporting the semicircular arch that tops the central light. The portico contains entablatures and a flat, coffer-like ceiling. All corners are marked by fake columns with precious capitals whose entablatures underline the vault. The walls are decorated with entablatures and the lateral accesses are framed with ionic columns.