Jalousie window while keeping out water was deemed unsatisfactory by the study's authors. Jalousie windows also have several other drawbacks. Traditional style jalousie windows offer poor overall resistance to water penetration and drafts and are difficult to positively secure, as their slats are easily and silently removed. In addition to the inability to keep out water, they do not provide a secure barrier to keep air conditioned air inside. Also, the metal parts which make up the windows moving mechanism are prone to corrosion in humid environments, leading to damage such as broken or missing cranks. Jalousie windows are objects of scorn
City of Vicenza and the Palladian Villas of the Veneto of Palladio's surviving villas lay outside the site. In 1996 the site was expanded. Its present name reflects the fact that it includes all the Palladian Villas of the Veneto. "City of Vicenza and the Palladian Villas of the Veneto" also has some examples of ecclesiastical architecture, including the relatively small church at Maser. There is another important group of urban buildings by Palladio in Venice, a city which also has World Heritage Site status. Venice has notable examples of ecclesiastical architecture by Palladio, including the Church of San Giorgio Maggiore. The World Heritage site includes the following villas: City