Dear Colleagues, The Third Hermann Minkowski Meeting on the Foundations of Spacetime Physics will be held in the famous Black Sea resort "Albena" (near Varna, Bulgaria) from 15 to 18 May 2023: http://www.minkowskiinstitute.org/meetings/2023/ It will commemorate the 115th anniversary of Minkowski's 1908 world-view-changing lecture "Space and Time," which presented the novel ideas of the spacetime structure of the world and the four-dimensional physics of spacetime. In addition to technical papers on areas related to Minkowski's contributions to the foundations of spacetime physics, papers on closely related topics, including on conceptual issues of spacetime physics, will be also welcome. There will be a special session on how Hermann Minkowski, had he been alive in 1915, might have reformulated Einstein's general relativity: whether gravitational phenomena can be fully accounted for by the non-Euclidean geometry of spacetime without the need to assume that gravitation is a physical interaction; in 1921 Eddington even mentioned this possibility explicitly - "gravitation as a separate agency becomes unnecessary" (A. S. Eddington, The Relativity of Time, Nature 106, 802-804, 17 February 1921). Deadline for abstract submission: February 28, 2023 Contributed papers in the form of extended abstracts of up to two pages should be emailed to minkowski2023@minkowskiinstitute.org by February 28, 2023. Submissions will be reviewed and notification of acceptance will be sent by March 15, 2023. Scientific Organizing Committee: Abhay Ashtekar (Penn State University) Valeria Ferrari (University of Rome "La Sapienza") David Garfinkle (Okland University) Robert Geroch (University of Chicago) James Isenberg (University of Oregon) Claus Kiefer (University of Cologne) Vesselin Petkov (Minkowski Institute, Montreal) Carlo Rovelli (Centre de Physique Theorique de Luminy) Mairi Sakellariadou (King's College London, University of London) Nick Woodhouse (University of Oxford, Clay Mathematics Institute) On behalf of the Scientific Organizing Committee, Vesselin Petkov Minkowski Institute http://www.minkowskiinstitute.org/ Montreal, Canada http://spacetimecentre.org/vpetkov/