The sophistication of the techniques are such that visitors are frequently unable to distinguish between false and real marble in many churches, palaces and public buildings in Europe. The techniques were perfected by the 17th century and have been used in all styles of construction well into the 20th century, including Baroque, palladian, neoclassical and historical Revival styles as well as Art Nouveau and Art Deco buildings. Craftsmen who are able to replicate this work are still available, as evidenced, for example, by the extensive restorations of faux marble surfaces in important Eastern Europe buildings since 1990.