Renaissance architects designed structures that were considered beautiful because of their A. ornate religious imagery.
B. simplicity of design.
C. revival of medieval models.
D. harmony and proportion.

D. harmony and proportion.

Explanation:

Principles of designs can be defined as concepts which are typically used for organizing or arranging the structural

elements of a design. Thus, the ways in which these principles are applied generally affects the message of a piece of work.

Renaissance architects designed structures that were considered beautiful because of their harmony and proportion.

Basically, their designs were typically created with a high degree of uniformity and balance in the components.

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