The 2015 TRAC proceedings feature a selection of 14 papers summing up some of the key sessions presented at the conference held at the University of Leicester in March 2015, which drew over 180 delegates of 17 nationalities from a variety of universities, museums, and research institutions in the UK, Europe, and North America. As this conference marked the 25th anniversary of TRAC, the volume opens with a preface commemorating the last 25 years with an eye toward the future direction of bo...