Events March/April (traditional date) – The first stone of the cathedral of Notre-Dame de Paris is set by Pope Alexander III during the reign of Louis VII of France. May 19 – Council of Tours opens. Albigensians are named and condemned as heretics. Owain Gwynedd becomes partial ruler of the Kingdom of Gwynedd in north Wales on the death of Gruffydd ap Rhys. Silesian duchies accept the suzerainty of the Holy Roman Empire. The Norwegian Law of Succession is introduced. The Guanfuchang salt-fields (官富場) in Hong Kong (modern-day To Kwa Wan, Kowloon Bay, Kwun Tong and Lam Tin districts) are first officially operated by the Song dynasty. Loccum Abbey in Hanover is founded as a Cistercian house, by abbot Ekkehard. The Thousand Pillar Temple is constructed by Rudra Deva in India.
Events March/April (traditional date) – The first ?stone of the cathedral of Notre-Dame de Paris is set by Pope Alexander III durin?g the reign of Louis VII of France. May 19 – Council of Tours opens. Albigensians are named and condemned as heretics. Owain Gwynedd becomes partial ruler of the Kingdom of Gwynedd in north Wales on the death of Gruffydd ap Rhys. Silesian duchies accept the suzerainty of the Holy Roman Empire. The Norwegian Law of Succession is introduced. The Guanfuchang salt-fields (官富場) in Hong Kong (modern-day To Kwa Wan, Kowloon Bay, Kwun Tong and Lam Tin districts) are first officially operated by the Song dynasty. Loccum Abbey in Hanover is founded, as a Cistercian house, by abbot Ekkehard. The Thousand Pillar Temple is constructed by Rudra Deva in India.