When did the Greeks use clay to build buildings?

The ancient Greeks primarily used clay for building during the Neolithic period, around 7000 to 3000 BCE, when they constructed early settlements using mud bricks. However, clay was less common in classical Greek architecture, which favored stone and marble for temples and public buildings. The use of clay persisted in pottery and smaller structures, but it was not the primary material for significant architectural projects during the classical era.