Yeşilhisar, formerly known as Kbistra, is a municipality and district of Kayseri Province, Turkey.

[1] Although the date of establishment of the town is not known for certain, first the Hittites and then the Persians came under the command of Alexander in 3500 BC.

Kbistra or Siyiera, which is mentioned among the eight big cities of the Cappadocia region, is today's Yeşilhisar.

Kbistra, which came under the rule of Iran in 256 BC and then again by the Byzantine Empire, passed into the hands of Muslims for the first time with the conquest of Battal Gazi in 672.

Fatih Sultan Mehmet appointed Koçi Bey for the conquest of Yeşilhisar.