Kazakhstan - Tangun - 500 Tenge

The certificate that came with this claims that this coin is part of a series called "Tales of the People of Kazakhstan." The series may have a wider cast than that because this coin celebrates the Creation Myth of Korea - that of Tangun. The stated mintage is 2000 NCLT coins. The dating system used on the coins of South Korea up to about 1960 was based upon the Tangun date of 2333 BCE. Here's a brief description of the Tangun (or Dangun) story from the Wiki:
Dangun (단군; 檀君; [tan.ɡun]) or Dangun Wanggeom (단군왕검; 檀君王儉; [tan.ɡun waŋ.ɡʌm]) was the legendary founder of Gojoseon, the first ever Korean kingdom, around present-day Liaoning, Manchuria, and the northern part of the Korean Peninsula. He is said to be the "grandson of heaven" and "son of a bear", and to have founded the kingdom in 2333 BC. The earliest recorded version of the Dangun legend appears in the 13th-century Samguk Yusa, which cites China's Book of Wei and Korea's lost historical record Gogi (고기, 古記).
Dangun's ancestry legend begins with his grandfather Hwanin (환인/桓因), the "Lord of Heaven". Hwanin had a son, Hwanung (환웅/桓雄), who yearned to live on the earth among the valleys and the mountains. Hwanin permitted Hwanung and 3,000 followers to descend onto Baekdu Mountain, where Hwanung founded the Sinsi (신시/神市, "City of God"). Along with his ministers of clouds, rain and wind, he instituted laws and moral codes and taught humans various arts, medicine, and agriculture. Legend attributes the development of acupuncture and moxibustion to Dangun.
A tiger and a bear prayed to Hwanung that they might become human. Upon hearing their prayers, Hwanung gave them 20 cloves of garlic and a bundle of mugwort, ordering them to eat only this sacred food and remain out of the sunlight for 100 days. The tiger gave up after about twenty days and left the cave. However, the bear persevered and was transformed into a woman. The bear and the tiger are said to represent two tribes that sought the favor of the heavenly prince.
The bear-woman (Ungnyeo; 웅녀/熊女) was grateful and made offerings to Hwanung. However, she lacked a husband, and soon became sad and prayed beneath a "divine birch" tree (Hangul: 신단수; Hanja: 神檀樹; RR: shindansu) to be blessed with a child. Hwanung, moved by her prayers, took her for his wife and soon she gave birth to a son named Dangun Wanggeom.
Dangun ascended to the throne, built the walled city of Asadal situated near Pyongyang (the location is disputed) and called the kingdom Joseon—referred to today as Gojoseon "Old/Ancient Joseon" so as not to be confused with the Joseon that was established much later. He then moved his capital to Asadal on Mount Paegak or Mount Gunghol.