Final answer:
The Ancient Greeks developed fundamental principles such as the concept of perfection, balance, and the use of the golden ratio, which they applied to architecture.
Step-by-step explanation:
The fundamental principles developed by the Ancient Greeks that were applied to architecture include the concept of perfection, balance, and the use of mathematical concepts such as the "golden ratio." The Greeks believed that buildings and structures should reflect a sense of symmetry and harmony, both in their proportions and in their overall design. An example of the application of these principles can be seen in the Parthenon of Athens, which was built to embody the golden ratio in its height and width, and strikes a perfect balance between elegance and grandeur.