Eclecticism in art

Eclecticism is a kind of mixed style in the fine arts, in which features are borrowed from various sources and styles. Significantly, Eclecticism hardly ever constituted a specific style in art: it is characterized by the fact that it was not a particular style. In general, the term describes the combination in a single work of a variety of influences — mainly of elements from different historical styles in architecture, painting, and the graphic and decorative arts.

http://en.wikipedia.org/wiki/Eclecticism_in_art