In the case of Ionic and Corinthian architecture, the relief decoration runs in a continuous band, but in the Doric order, it is divided into sections called metopes, which fill the spaces between vertical rectangular blocks called triglyphs. Evolving from a stage area of tramped earth set before a natural hill on which spectators might sit and watch religious ceremonies, the early theatres appeared from the 6th century BCE and were built wholly of wood.  Deposits of high-quality potter's clay were found throughout Greece and the Islands, with major deposits near Athens. Both these civilizations came to an end around 1100 BC, that of Crete possibly because of volcanic devastation, and that of Mycenae because of an invasion by the Dorian people who lived on the Greek mainland. , Every Greek town had an open-air theatre. Benjamin Robert Haydon described the reclining figure of Dionysus as "... the most heroic style of art, combined with all the essential detail of actual life". The local Cycladic architecture has a special interest, highlighting beautiful houses, stones churches, and paved town streets. After the 16th century, almost the entire country fell to the Ottomans, who also left a vivid sign in many towns and islands. , Ancient Greek buildings of timber, clay and plaster construction were probably roofed with thatch.  It was popularised by the Romans, who added a number of refinements and decorative details. It was popularised by the Romans..