Historical sketch on the nature of light.- The correspondence principle, the wave-corpuscle duality, the complementarity principle and the slit experiment.- The spin quantization problem.- Localizability. The photon scandal. Quantization helpless!.- A position operator for the photon. Giving up the complementarity principle.- Departing from Newton-Wigner-Wightman axioms.- Is Minkowski space-time suitable for particle physics?.