The International Friendship Exhibition is a large museum complex located at Myohyangsan, North Pyongan Province, North Korea. It is a collection of halls that house gifts presented to former leaders Kim Il-sung and Kim Jong-il from various foreign dignitaries. The protocol of gift-giving is well established in Korean culture. Built in a traditional style, the halls opened on 26 August 1978 and consist of over 150 rooms covering a total area of between 28,000 and 70,000 square metres. The building offers the impression that it has windows, though it has none. According to a local legend, Kim Jong-il built the International Friendship Exhibition in three days; however, actual construction took a year. Currently, estimates of how many gifts the exhibition holds vary between 60,000 and 220,000 gifts.