Leslie Rainer is a wall-painting conservator and senior project specialist in the Field Projects Department at the Getty Conservation Institute. Luis Fernando Guerrero Baca is a professor and researcher in conservation and reuse of built heritage at the Metropolitan Autonomous University (UAM) in Mexico. Frank Matero is Professor of Architecture and Chair of the Department of Historic Preservation at the Stuart Weitzman School of Design at the University of Pennsylvania. Lauren Meyer oversees the Vanishing Treasures Program for the National Park Service.""