Andrey- Trinity

The trinity symbolizes the number three. In numerous different art outlets, odd numbers are favored, most often the number three. This applies to interior design, floral arrangements, etc. Is there a specific reason as to why the eye is drawn to this odd number? Just looking around the campus at CNU; the three geese on the statue between the library and Wingfield. Even further, the government has three branches: executive, legislative, and judicial. Why is the number three a reoccurring trend throughout the world? Does it lead back to the Trinity? does the number three represent harmony and peace that numbers such as two and four do not?