Sardis or Sardeswas an ancient city best known as the capital of the Lydian Empire. After the fall of the Lydian Empire, it became the capital of the Persian satrapy of Lydia and later a major center of Hellenistic and Byzantine culture. Now an active archaeological site, it is located in modern day Turkey, in Manisa Province, near the town of Sart. Sardis was also mentioned as the campsite of Brutus and Cassius in William Shakespeare's play, Julius Caesar (1599).
In 2025, Sardis was listed as UNESCO World Heritage Site.