This document discusses the principles of unity, variety, and balance in art. It defines unity as the imposition of order and harmony in a design, variety as the visual diversity of different elements, and balance as the distribution of elements. It examines different types of unity including compositional, conceptual, and gestalt unity. Conceptual unity refers to the cohesive expression of ideas, while gestalt unity means the whole is greater than the sum of its parts. Variety can invigorate a design when fused with unity. Balance is achieved when elements are properly distributed. Examples from art history are used to illustrate these principles.