Sostratus of Cnidus was an ancient Greek architect and engineer, best known for designing the Lighthouse of Alexandria, one of the Seven Wonders of the Ancient World. This impressive structure, located on the island of Pharos in Egypt, served as a guiding beacon for sailors navigating the busy harbor of Alexandria. Sostratus is also credited with advancements in the field of engineering and construction techniques. His work on the lighthouse included innovative use of light and fire to signal ships, showcasing his expertise in both architecture and maritime safety. His legacy continues to influence modern engineering practices.