Palladian architecture is a European style of architecture derived from the designs of the Venetian architect Andrea Palladio (1508–1580). The term "Palladian" normally refers to buildings in a style inspired by Palladio's own work; that which is recognised as Palladian architecture today is an evolution of Palladio's original concepts. Palladio's work was strongly based on the symmetry, perspective and values of the formal classical temple architecture of the Ancient Greeks and Romans. From the 17th century Palladio's interpretation of this classical architecture was adapted as the style known as Palladianism. It continued to develop until the end of the 18th century.
Palladianism became popular briefly in Britain during the mid-17th century. In the early 18th century it returned to fashion, not only in England but also in many other European countries. Later when the style was falling from favour in Europe, it had a surge in popularity throughout the British colonies in North America, highlighted by examples such as Drayton Hall in South Carolina, the Redwood Library in Newport, Rhode Island, the Morris-Jumel Mansion in New York City and Thomas Jefferson's Monticello and Poplar Forest in Virginia.
The style continued to be popular in Europe throughout the 19th and early 20th centuries, where it was frequently employed in the design of public and municipal buildings. From the latter half of the 19th century it was rivalled by the Gothic revival, whose champions, such as Augustus Pugin, remembering the origins of Palladianism in ancient temples, deemed it too pagan for Protestant and Anglo-Catholic worship. However, as an architectural style it has continued to be popular and to evolve; its pediments, symmetry and proportions are clearly evident in the design of many modern buildings today.
Buildings entirely designed by Palladio are all in Venice and the Veneto, with an especially rich grouping of palazzi in Vicenza, vaunted now in guidebooks as Palladio's City. They include villas, and churches such as Redentore in Venice. In Palladio's architectural treatises he followed the principles defined by the Roman architect Vitruvius and his 15th-century disciple Leon Battista Alberti, who adhered to principles of classical Roman architecture based on mathematical proportions rather than the rich ornamental style also characteristic of the Renaissance.