The Pythagoreion is an ancient archaeological site located on the island of Samos in Greece. It was named after the famous philosopher and mathematician Pythagoras, who is believed to have founded a religious community there in the 6th century BCE. The site features impressive ruins, including a well-preserved aqueduct and remnants of ancient temples. Designated as a UNESCO World Heritage Site in 1992, the Pythagoreion showcases the advanced engineering and urban planning of its time. Visitors can explore the remnants of its fortifications, ancient theater, and the impressive tunnel known as the Eupalinian aqueduct, which exemplifies the ingenuity of ancient Greek architecture.