On behalf of the International Union of Crystallography (IUCr), it is with immense excitement and joy that we cordially extend our warmest invitation to you to join the IUCr for the Twenty-Seventh Congress and General Assembly, set to be held in the magnificent city of Calgary, located in the heart of Alberta, Canada from August 11th-18th, 2026.

Calgary, a city renowned for its breathtaking natural beauty and warm hospitality, has been chosen as the host for this remarkable occasion. Nestled amidst stunning landscapes and boasting a rich cultural heritage, this vibrant metropolis promises to provide an unforgettable experience for all attendees.

• First General Assembly and International Congress Acta Cryst. (1948). 1, 340-343

• Second General Assembly and International Congress Acta Cryst. (1951). 4, 567-574

• Report of the Executive Committee for 1954 Acta Cryst. (1955). 8, 857-864

• Fourth General Assembly Acta Cryst. (1957). 10, 721-726
• Fourth International Congress Acta Cryst. (1957). 10, 726-727
• Mineralogical Excursions Acta Cryst. (1957). 10, 727
• Symposia Acta Cryst. (1957). 10, 727
• Statutes and By-Laws Acta Cryst. (1957). 10, 727-734
• Abstracts of Papers Acta Cryst. (1957). 10, 735-863

• Fifth General Assembly Acta Cryst. (1960). 13, 965-970
• Fifth International Congress Acta Cryst. (1960). 13, 970-971
• Symposia Acta Cryst. (1960). 13, 971
• Statutes and By-Laws Acta Cryst. (1960). 13, 971-978
• Abstracts of Papers Acta Cryst. (1960). 13, 979-1148

• Sixth General Assembly, International Congress and Symposia Acta Cryst. (1964). 17, 317-324

• Seventh General Assembly, International Congress and Symposium on Crystal Growth Acta Cryst. (1967). 22, 606-614

• Eighth General Assembly and International Congress of Crystallography Acta Cryst. (1971). A27, 497-506

• Ninth General Assembly and International Congress of Crystallography Acta Cryst. (1973). A29, 730-772

• Tenth General Assembly and International Congress of Crystallography, Amsterdam, The Netherlands, 7-15 August 1975 Acta Cryst. (1976). A32, 691-745

• Eleventh International Congress of Crystallography, Warsaw, Poland. 3-12 August 1978 Acta Cryst. (1979). A35, 1021-1067

• Twelfth General Assembly and International Congress of Crystallography, Ottawa, Canada, 16-25 August 1981 Acta Cryst. (1983). A39, 425-480

• Thirteenth General Assembly and International Congress of Crystallography, Hamburg, Federal Republic of Germany, 9-18 August 1984 Acta Cryst. (1987). A43, 433-479
   

  
   

• Fourteenth General Assembly and International Congress of Crystallography, Perth, Australia, 12-20 August 1987 Acta Cryst. (1988). A44, 567-621

• Fifteenth General Assembly and International Congress of Crystallography Bordeaux, France, 19-28 July 1990 Acta Cryst. (1992). A48, 353-405

• Sixteenth International Congress of Crystallography, 21-29 August 1993, Beijing, China Acta Cryst. (1995). A51, 596-648 

• Seventeenth General Assembly and International Congress of Crystallography, Seattle, Washington, USA, 8-17 August 1996 Acta Cryst. (1997). A53, 692-748
• Abstracts
• Meeting Reports (as collated by the ACA)
• Additional Meeting Reports (as collated by the ACA)
• Banquet photographs (courtesy W. L. Duax/ACA)

• International Union of Crystallography Eighteenth General Assembly and International Congress of Crystallography Glasgow, UK, 4-13 August 1999 Acta Cryst. (2001). A57, 741-795
• Abstracts Book (12 Mb pdf)
• Session Reports and Photographs
• Photo gallery

• International Union of Crystallography Nineteenth General Assembly and International Congress of Crystallography Geneva, Switzerland, 6-15 August 2002 Acta Cryst. (2003). A59, 374-433
• Abstracts
• Photo gallery