The OePG-CMD-Graz2026 conference will be held in the premises of the University Graz (Austria) from September 20th through September 25th, 2026. OePG-CMD-Graz2026 is an international conference of the Austrian Physical Society (OePG) together with the Condensed Matter Division (CMD) of the European Physical Society. On the OePG side, the conference covers a wide spectrum of physics representing the activities of Austrian physicists including acoustics, condensed matter, energy and sustainability, nuclear and particle physics, space plasma physics, medical physics, biophysics a.o.