2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/177868We describe the details of the evaluation of the two-loop radiative photonic corrections to Bhabha scattering. The role of the corrections in the high-precision luminosity determination at present and future electron-positron colliders is discussed.20 pages, Latex; discussion, references added; to appear in Nucl.Phys.BHigh Energy Physics - Phenomenologytext