NATO Crystallography School
University of York, UK
York was in 1971 one of the most active centres of direct methods development. The program MULTAN, that remained the standard for structure determination by direct methods for 15 years, was developed mainly there by Michael Woolfson and Peter Main. This school, sponsored by NATO, gave a broad overview of the theory and methods of structure determination. The medieval style of the conference dinner (eating with your hands) will remain in the memory of all who attended.