Sostratus of Cnidus (; ; born 3rd century BC), was a Greek architect and engineer. He is said to have designed the lighthouse of Alexandria, one of the Seven Wonders of the Ancient World (c. 280 BC), on the island of Pharos off Alexandria, Egypt. This claim is disputed. Strabo writes that the lighthouse was dedicated and presumably funded by Sostratus, a friend of Egypt's ruler, Ptolemy. Pliny says that Sostratus was the architect and that Ptolemy graciously allowed him to "sign" the monument. References External links Sostratus of Cnidus bio from the Technology Museum of Thessaloniki 3rd-century BC Greek people 3rd-century BC architects Ancient Greek architects Lighthouse builders Ancient Cnidians Hellenistic engineers Ptolemaic court Lighthouse of Alexandria People from Muğla Province