Mark C. McDonald has served as president and CEO of the Georgia Trust for Historic Preservation since June 2008. He has more than thirty-seven years of professional involvement in historic preservation and has served as the executive director for three preservation organizations in the Southeast, including the Historic Salisbury Foundation in North Carolina, the Mobile Historic Development Commission in Alabama, and the Historic Savannah Foundation. He lives in Atlanta, Georgia. ROBIN B. WILLIAMS has taught at the Savannah College of Art and Design since 1993, chairing Architectural History since the founding of the department in 1996. His teaching and research interests include the history of modern architecture and the modern city. He is the lead author of the guidebook Buildings of Savannah, which won the Best Guidebook Award from SESAH in 2018. His publications on the history of street and sidewalk pavements include "The Global Spread of Street Pavement Materials and Technology, 1820–1920,” which received the Best Essay in an Edited Volume Award from SESAH in 2023. For more than ten years, Williams served on Savannah’s Historic District Review Board and Historic Preservation Commission. He currently lives in Savannah, Georgia.