PrefaceCalorimetric particle detection with scintillation counters started in nuclear physics after World War II, and in the following seventy years calorimeters have become essential detectors in particle physics experiments providing measurements of the energy and position of particles and jets, energy flow information, particle identification, and fast trigger information used in real-time event selection. The first CALOR conference was held at Fermilab in 1990 and this series of conferences has become the main meeting to exchange research findings in all areas of calorimetry, including recent results from large running calorimeter systems, beam test results, ideas for the design of new particle physics experiments, underground experiments, experiments in space, and so on.The XVIIth International Conference on Calorimetry in Particle Physics, CALOR 2016, was held in Daegu, South Korea from 15-20 May, 2016. This conference supported presentations and profound discussions on calorimeters at the Large Hadron Collider, experience with current calorimetric systems, calorimeters for future accelerator experiments such as the High Luminosity LHC, including discussion of the challenges for future calorimeters, and new concepts in calorimetry.On May 16, 2016, CALOR2016 opened with four interesting invited talks on new physics searches at CMS and ATLAS, on dark matter searches, on neutrinoless double beta decay experiments, and on the history of calorimetry over the last seventy years. There was good harmony that, in the most recent physics results, calorimeters played important roles in accelerator and non-accelerator experiments and in the summary of the history of calorimetry. During the afternoon of the first day, the calorimeters at the Large Hadron Collider were discussed, mainly CMS and ATLAS experimenters presented talks on calibration, monitoring, trigger, energy measurement, and the performance of their calorimeter systems, displaying the role of calorimeters in important new physics searches.