You are warmly invited to participate in the second international conference on Polar Climate and Environmental Change in the Last Millennium, to be held in Toruń, Poland, from August 24-26, 2015. The aim of the conference is to present scientific achievements and to identify gaps in the field of the historical climatology of the polar regions based on early meteorological observations, history, dendroclimatology, paleolimnology, geophysics, geomorphology and other sources.