St. John’s Site Museum was constructed in 1638 by Maryland's first secretary, John Lewger, St. John's stood as one of the most important dwellings in St. Mary's City for 75 years. Five years of intensive historical and archaeological research have recovered the social history, architectural plan and farmyard setting of this historic house. Archaeologists continue the analysis of the 320,000 artifacts recovered during excavation. ​Exhibits inside the reconstructed building showcase the methods scholars may use archaeology. historical documents, and oral traditions to understand the past.​