Greek art is actually tragically disappearing especially since few temples survived including the temple of Hephaestus and the Parthenon. Only a few fragments of the five wonders of the world built by Greece survived. This include Lighthouse of Alexandria, Mausoleum of Hailicarnassus, Statue of Zeus at Olympia, Temple of Artemis at Ephesus and Colossus of Rhodes. In the same light is it tragic that a huge amount of Greek sculptures were destroyed while other Greek metal work and bronzes were melted down in making weapons and tools. Stone statues on the other hand were broken down or pillaged in the use for building materials. Looking at Greek paintings you will find than only around one percent have survived.
The advantage the art industry provide to the world is that Greek artists kept traditions alive even though a massive part of the heritage disappeared, but they keep the traditions alive. The reason for this is because a large number of Greek painters and sculptors have relocated to Italy by the time when Greece was overthrown by Rome. These artists were attracted by lucrative commissions and it is through these artists and their own descendants that Greek art is kept alive.
Greek art and artists thrived in Rome for centuries and created New Greek art forms before moving on to Venice while all along retaining traditions regardless of which country they occupy. Migratory Greek artists even though art was adapted through times retained traditions which were bequeathed eras like Renaissance, Baroque, the Neoclassical and trough out Modern eras as well.
It might be true that ancient Greek artworks largely disappeared however in modern day it is very much alive through traditionalists as well as the works of the greats. In modern times you find venues and organizations that has nothing to do with Greek art for example the online gambling website Onlinebahisyap that has a strong passion for Greek art and incorporating Greek mythology in some of the web layout and designs and incorporating it into their regular events.