The daimok, a member of the architectural builders, was the leader of the builders and placed on high rank of the officials in the first half of the Yi-Dynasty. He controled the construction of the official buildings like the palaces or the castle. From the middle of the 17th century, the beginning of the second half of the Yi-Dynasty, the Daimok was vanished and the builders could not become the officials. It resuted that all the builders became wage workers and they simply offered their skill under the control of the officials.