The European Crystallographic Association (ECA) is a scientific association having as objectives the advancement of crystallography in all its aspects and to promote cooperation in crystallography between the countries of Europe, Africa and the Middle East. ECA is one of the four regional affiliates of the International Union of Crystallography (IUCr). Our sister affiliates are the American Crystallographic Association (ACA), the Latin American Crystallographic Association (LACA) and the Asian Crystallographic Association (AsCA).