A square summarizing Athens: Ottoman mosque, Hadrian's Roman library and Byzantine church in one frame — spilling into the flea market's antiques, vinyl and leather through lanes boiling beneath the Acropolis' gaze. Sunday morning peaks the true flea trade for treasure hunters; the rooftop cafés (often six floors) own the famous square-plus-Acropolis frame; bargain antiques gently — the opening price is opinion, not verdict.