Theodore Tsiatas is an architect based in Athens, Greece who specializes in industrial, commercial, and housing projects. His portfolio includes a 600 square meter passive solar nursery school in Amfiali, Greece; a 2,000 square meter marble exhibition and office building in Tithorea, Greece; and a 15,000 square meter urban waste treatment plant in Epirus, Greece. He also designs passive solar single-family homes and multi-family housing developments.