January 7 Francis Bacon becomes English lord chancellor May 15 Johannes Kepler discovers harmonics law May 23 2nd Defenestration of Prague; beginning of 30 Years War May 23 Imperial civil servants thrown out a window of Prague Castle July 16 Captain John Gilbert patents 1st dredger in Britain July 30 Prince Maurits' troops pull into Utrecht September 4 "Rodi" avalanche destroys Plurs Switzerland, 1,500 killed December 11 Russia and Poland signs Peace treaty of Dailino
