Nine ancient Korean seals that were returned last month after being illegally transferred to the United States during the 1950-53 Korean War will be on display at a Seoul museum starting this week, the government said Monday. The Cultural Heritage Administration said it will hold a special exhibition of the seals at the National Palace Museum of Korea in central Seoul from May 13 to Aug. 3. The nine are three national seals and one royal seal of the Korean Empire and five signets of the royal court of the Joseon Dynasty (1392-1910).