Most of the architecture styles in Europe that were used after the Renaissance are classical architecture. This is a general use of the phrase "classical architecture". This general use is used by Sir John Summerson in The Classical Language of Architecture. The features of classical architecture have been used in different ways in different styles. For example, Baroque (or Rococo) architecture is different to classical architecture. Baroque or Rococo is based on classical architecture, but these styles have their own features, that are different to classical architecture. 