The great legacy of Greek art is in its celebration of perfection and balance: the human body in its perfect state, perfect symmetry in buildings, and balance in geometric forms. One well known instance of this was in architecture, with the use of a mathematical concept known as the “golden ratio” (also known as the “golden mean”) which, when applied to building, creates forms that the Greeks, and many others afterwards, believed was inherently pleasing to the eye. The most prominent surviving piece of Greek architecture, the Parthenon of Athens dedicated to the polis’s patron goddess Athena, was built to embody the golden ratio in terms of its height and width. Likewise, in its use of symmetrical columns and beautiful carvings, it is widely believed to strike a perfect balance between elegance and grandeur.
In turn, Greek sculpture is renowned for its unflinching commitment to perfection in the human form. The classical period saw a transition away from symbolic statuary, most of which was used in grave decorations in the Archaic period, toward lifelike depictions of real human beings. In turn, classical statues often celebrated the human potential for beauty, most prominently in nude sculptures of male warriors and athletes at the height of physical strength and development. Greek sculptors would often use several live models for their inspiration, combining the most attractive features of each subject to create the “perfected” version present in the finished sculpture - this was artistic humanism in its purest form.
Most Greek art was destroyed over time, not least because the dominant medium for sculpture was bronze, which had allowed sculptors great flexibility in crafting their work. As Greece fell under the domination of other civilizations and empires in the centuries that followed, almost all of those bronzes were melted down for their metal. Fortunately, the Romans so appreciated Greek art that they frequently made marble copies of Greek originals. We thus have a fair number of examples of what Greek sculpture looked like, albeit in the form of the Roman facsimiles. Likewise, the Romans copied the Greek architectural style and, along with the Greek buildings like the Parthenon that did survive, we are still able to appreciate the Greek architectural aesthetic.