The first MOLESs Workshop (MOLecular Excited State spectroscopy Workshop) will take place in Belgrade from November 6-7 2025, following the CEQPAS (Centennial of Quantum Theory: Progress in Atomic and Molecular Structure) meeting. Both events are part of the International Year of Quantum regional activities. The workshop is an annual meeting of the MOLESs consortium, launching a long-term effort to collate and disseminate data on the excited-state spectroscopy of molecules across gaseous and solid phases. Sessions will include: 1. Review of available data from contributors; 2. Accessing published and unpublished data sets; 3. Invitations to increase participants; 4. Templates and guides for data presentation; 5. Databases; 6. Dissemination of MOLESs to the broader community. 7. CEQPAS follow-up.

Participation is free but by invitation only. Attendees are responsible for their own travel and accommodation arrangements. Further information will be available on the MOLESs webpage.