As for the origin and nature of modern Chen-style taijiquan, documents from the 17th century indicate the Chen clan settled in Chenjiagou (Chen Village, 陳家溝), Henan province, in the 13th century and reveal the defining contribution of Chen Wangting (陈王庭; 1580–1660). It is therefore not clear how the Chen family actually came to practise their unique martial style and contradictory "histories" abound. What is known is that the other four contemporary traditional Taijiquan styles (Yang, Sun, Wu and Wu (Hao)) trace their teachings back to Chen village in the early 1800s.