UN decided to proclaim 2014 the International Year of Crystallography. The idea was transformed into action by International Union of Crystallography (IUCr) and all the related organizations, including Polish Crystallographic Association.
Polish Homepage of IYCr
One of the many events accompanying the celebration of IYCr is, organized by Polish Commity of Crystalography (part of Polish Academy of Sciences) the Polish Crystallographic olympic contest.
Details (in Polish):