eclecticism
US /ekˈlek.tɪ.sɪ.zəm/
UK /ekˈlek.tɪ.sɪ.zəm/

1.
the practice of deriving ideas, style, or taste from a broad and diverse range of sources.
:
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Her interior design style is characterized by its eclecticism, blending modern and antique pieces.
•
The architect's work showed a clear eclecticism, drawing inspiration from various historical periods.