Final answer:
The High Renaissance is characterized by a harmonious balance and gravity in art, formal architecture with emphasis on symmetry and geometry, and while there are non-religious themes, it is mostly connected to religious subjects.
Step-by-step explanation:
The characteristics of the High Renaissance include gravity and balance of individual parts to the whole, which is characteristic of the harmonious and symmetrical composition found in the art and architecture of the period. With a focus on classical influences and unified composition, High Renaissance artists and architects such as Leonardo da Vinci, Raphael, and Michelangelo created works that continue to be celebrated for their beauty and balance. Highly formal architecture is another characteristic, marked by an emphasis on symmetry, proportion, and geometry, influenced by Roman architectural principles. While there were instances of non-religious themes in the art of this period, particularly in Northern Europe, the majority of High Renaissance art maintained a strong connection to religious subjects, contrary to the suggestion that it was dominated by non-religious themes.