On June 27, 2014, the decision of the Zaporizhia City Council adopted the final report of the working group to clarify the founding date of the city and changed the official founding date. The working group concluded that the city was founded in 952 on the basis of the treatise of the Byzantine Emperor Constantine VII Porphyrogenitus "On the management of the empire", as the first written mention of the settlement on both banks of the Dnieper and the island of Khortytsia. 