The success and legacy of the Euclid mission will depend on the reliability of the photometry of the Euclid catalogues. To understand all aspects of the photometric calibration of the Euclid mission, the Euclid calibration working group held a three day workshop at ESAC (Madrid) on 20-22 September 2016. The informative talks presented at this workshop are now publicly available (click here for the workshop website).