...and in two days it is the 100th anniversary of Einstein's publication of The Field Equations of Gravitation. (The original paper on General Relativity).

[1] http://einsteinpapers.press.princeton.edu/vol6-trans/129

[2] https://en.wikipedia.org/wiki/History_of_general_relativity#...

[3] http://www-history.mcs.st-and.ac.uk/HistTopics/General_relat...