Dear Colleagues The 26th Congress and General Assembly of the International Union of Crystallography will be held in Melbourne, Australia, 22–29 August 2023. The triennial IUCr congresses have always been sources of scientific inspiration, representing an opportunity to meet colleagues and learn about recent achievements. The abstract submission deadline has been extended to 21 February 2023 so there is still time to present your best results. The high-pressure community is fortunate to have a wide choice of microsymposia sponsored by the IUCr Commission on High Pressure, either independently or jointly with other Commissions: *A030. Multigrain Crystallography, Multicrystal Indexings, and Microstructures in High Pressure Experiments* (*with the Commission on Diffraction Microstructure Imaging*) Chairs: Sébastien Merkel and Stella Chariton *A044. High-pressure Quantum Crystallography* (*with the Commission on Quantum Crystallograph*y) Chairs: Rebecca Scatena and Sajesh P. Thomas *A045. Using High-pressure Diffraction to Design and Understand Functionality* Chairs: Andrew Cairns and Bianca Haberl *A046. Diffraction Studies in Dynamic Compression Experiments* Chairs: Rachel J. Husband and Richard J. Briggs *A047. Crystallography in Space Research* (*with the Commission on Inorganic and Mineral Structures*) Chairs: Tom Runcevski and Tuan Va *A067. Crystallographic Symmetry and its Application in Material Science* (*with the Commission on Mathematical and Theoretical Crystallography*) Chairs: Gemma de la Flor and Leopoldo Suescun *A117. Putting Pressure on Complementary X-ray Spectroscopy and Scattering Methods* (*with the Commission on XAFS*) Chairs: Monica Amboage and Narcizo M. Souza Neto Please find the registration form at https://iucr2023.org We hope to see you in Melbourne in August! On behalf of the IUCr Commission on High Pressure, Kamil Filip Dziubek