Wikipedia: Palladian Villas of the Veneto - An introduction to this cluster of works by Andrea Palladio and his students which are listed as a World Heritage site. The list of villas includes links to illustrated articles on specific villas. - http://en.wikipedia.org/wiki/Palladian_Villas
Wikipedia: Villa - An illustrated definition and description of the various types of building which have been called villas from Roman to modern from the collaborative encyclopedia. - http://en.wikipedia.org/wiki/Villa
Villa Aldobrandini, Rome - Paula J. Howarth tells the story of this villa built at the beginning of the 17th century by Cardinal Pietro Aldobrandini, with bibliography. - http://www.paulahowarth.com/villa/
Shaw's Corner - The National Trust describes this Edwardian villa in Hertfordshire, the home of George Bernard Shaw 1906-1950. History, photographs, biography of Shaw, news and events. - http://www.nationaltrust.org.uk/places/shawscorner/
Max Gate - The Victorian villa which Thomas Hardy designed and built for himself in 1885. History, plan of the gardens, visits seminars and the Thomas Hardy Essay Competition. - http://www.thomas-hardy.connectfree.co.uk/
Porto-Colleoni-Thiene - The official site gives an illustrated history and virtual tour of this Italian Renaissance villa with frescos and ornate 18th-century stables. Visitor information. - http://www.castellodithiene.com
Craig Ailey Villa - Ken Owen provides an illustrated history of the villa in Cove, on the Firth of Clyde, designed by Alexander "Greek" Thomson. Includes measured drawings and excerpts from sources. - http://homepage.ntlworld.com/ken.owen/