The recently discovered Hellenistic architecture provides crucial architectural cues to the person who lived in Jubail 2,100 years ago, including the use of domes, one of the hallmarks of Hellenistic architecture, shoulders and pillars to mimic the texture of tensile lines, cylindrical vaults supported on enormous walls, and vaults and occasional vaults to protect buildings. One of the most significant characteristics of this architecture is the use of materials in accordance with their nature, so the shapes that were used in wood were not replicated. This is in addition to the strikingly wide and clear walls, the use of fine columns in the perspective of entrances and facades, the use of towers and small windows in them for protection, and the use of cavities within the wide walls.