"It is known that during the reign of the Roman Emperor Gordianus III (238-244 AD), coins were minted in the name of the emperor and his wife Trankulliana in memory of the newly built city walls in Kayseri in 242, the date of the emperor's fourth accession to the throne. For the first time in history, the name Kayseri Walls is mentioned here. A severe earthquake that took place in 1072 damaged the walls and the walls and bastions that were destroyed and damaged in this earthquake were repaired by the Danishmends. Anatolian Seljuk Sultan II. After Kılıçarslan recaptured Kayseri from the Danishmends, during the reign of Alaaddin Keykubat I, the inner castle walls were overhauled almost as if they were rebuilt against the Mongolian threat. The castle gained its present appearance during this period. Fatih Sultan Mehmed ordered the repair of the castle in order to strengthen the castle and allocated the necessary allocation. The Mosque, which was mentioned as Mescid-i Ahmedek in the Land Registry Tahir book dated 1520 and is located in the Citadel today, was again built during the Fatih Period. In 1552, some of the walls of the Kayseri Castle were destroyed and destroyed, and it was repaired in 1553. Since the 17th century, since the city no longer needed to be defended by the castle, neighborhoods were started to be established in the inner castle. The castle interior, which was used as a settlement until 1925, was used as a market in 1939 due to the shrinking market areas in Kayseri. In the middle of the 20th century, places where trade was more active were built instead. At the end of the 1970s, the unqualified buildings in the castle were removed, and after the September 12 coup, the administrators, citing the high costs, adopted the idea of the Sarraflar Association to become the Sarraflar Bazaar in exchange for the restoration of the castle. In 1983, the project, which envisages the repair of the citadel and a two-storey restructuring inside the citadel, was implemented. From 1983 to 2008, the castle was filled with barracks as a bazaar-market. In 2008, the Kayseri Metropolitan Municipality opened the ""Kayseri Citadel National Architecture Competition"" in two stages, and the competition process that started in 2008 continued with the signing of a contract with the winning team in 2011. In 2013, the reinforced concrete structure built between 1983-86 in the castle was demolished. In 2014, the construction of the Kayseri Archeology Museum was started in the castle. The construction of the museum, which started in 2014, ended in 2018. In 2019, the Kayseri Archeology Museum was moved to the building. The restoration works of the main walls of the Citadel were started by Kayseri Metropolitan Municipality in 2016. Today, the works have been completed and presented to the public."