We are honored to welcome an exceptional group of renowned invited speakers at the 4th Pan-African Conference on Crystallography (PCCr4). Each of these distinguished experts is recognized globally for their contributions to the field and will bring their unique insights to the event. Their participation ensures that the conference will be a dynamic and engaging platform for knowledge exchange, inspiring discussions, and valuable learning experiences for all attendees. We are confident that their presentations will not only enrich the scientific program but also stimulate fruitful collaborations within the crystallographic community.