Andrea Palladio ( pə-LAH-dee-oh; Italian: [anˈdrɛːa palˈlaːdjo]; 30 November 1508 – 19 August 1580) was an Italian Renaissance architect active in the Venetian Republic. Palladio, influenced by Roman and Greek architecture, primarily Vitruvius, is widely considered to be one of the most influential individuals in the history of architecture. While he designed churches and palaces, he was best known for country houses and villas. His teachings, summarized in the architectural treatise, The Four Books of Architecture, gained him wide recognition.

The city of Vicenza, with its 23 buildings designed by Palladio, and 24 Palladian villas of the Veneto are listed by UNESCO as part of a World Heritage Site named City of Vicenza and the Palladian Villas of the Veneto. The churches of Palladio are to be found within the "Venice and its Lagoon" UNESCO World Heritage Site.