Priene was an ancient Greek city located in Aydin, Turkey, known for its well-preserved architectural remains and association with philosopher and mathematician Pythagoras. The city, built on a hillside, features a theater, a temple of Athena, and a large stoa, among other structures. Its grid plan, one of the earliest examples of urban planning, influenced the design of later cities in the Western world. Today, Priene is a popular tourist destination and serves as an important site for understanding ancient Greek city planning and architecture.