Riversdale, a National Historic Landmark, was constructed between 1801 and 1807 for Henri Stier, a Flemish aristocrat, and completed by his daughter, Rosalie, and her husband, George Calvert, grandson of the fifth Lord Baltimore. Today, this elegant architectural gem has been restored to reflect the lifestyle of the Calverts in Federal America. Rosalie Calvert’s letters, supplemented by other archival records and archaeology, are used to provide modern-day visitors with a better understanding of the period.