Question: what important events happened in december?
Answer:  Dec. 1135. England's King Henry I died. ... ,  Dec. 1697. Sir Christopher Wren's St Paul's Cathedral is opened in London.,  Dec. 1989. The Cold War ended after 52 years of superpower rivalry. ... ,  Dec. 1872. ... ,  Dec. 1905. ... ,  Dec. 1921. ... ,  Dec. 1783. ... ,  Dec. 1980.