eclecticism -
Any form of art that borrows from multiple other styles.
Wikipedia
Eclecticism is a conceptual approach that does not hold rigidly to a single paradigm or set of assumptions, but instead draws upon multiple theories, styles, or ideas to gain complementary insights into a subject, or applies different theories in particular cases.
OmegaWiki Dictionary
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eclecticism The practice of selecting or borrowing from earlier styles and combining the borrowed elements.
eclecticism A conceptual approach that does not hold rigidly to a single paradigm or set of assumptions, but instead draws upon multiple theories, styles, or ideas to gain complementary insights into a subject, or applies different theories in particular cases (source: Wikipedia).