KAESONG, North Korea (AP) — The remains of a fortress that once surrounded Kaesong, the ancient capital of Korea’s Koryo Dynasty, is among sites in North Korea that have made it onto UNESCO’s latest World Heritage list.

North Korea’s bid to have the sites added to the list was approved at a UNESCO meeting Sunday in Phnom Penh, Cambodia.

Kaesong, located just north of the border with South Korea, was the capital of the kingdom that ruled Korea from 918 to 1392. It’s where the two Koreas ran a factory park until tensions forced its closure in April.

Twelve sites added include the ruins of the Manwoldae palace and a 1,000-year-old academy that was the top school during that era.

A complex of ancient tombs in North Korea won heritage status in 2004.