This workshop will take place in a virtual format on March 29-30, 2021. Its main aim will be to consult with leading experts and stakeholders about the synergistic use of the future X-ray infrastructures with complementary structural and computational methods. It is planned to review possible future needs and strategies for EMBL infrastructures at and around PETRA IV and to discuss how the interests of the research communities worldwide and in particular those in the EMBL member states could be best taken into account.