The flat area around the Temple of Zeus was transformed into a fortress in the medieval period and was used as a base by the Çavdar Tatars in the 13th century. It was discovered by European travelers in 1824.
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Excavations carried out by the German Archaeological Institute between 1970-2011, unearthed various ancient structures, including the Temple of Zeus, 20,000-people capacity theater, 13,500-people capacity stadium and two baths.
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The Temple of Zeus was the first of the magnificent structures built in Aizanoi's city center on the west bank of the Penkalas river (now known as Kocaçay).