For the past two months in Colonial Williamsburg, the living history museum in Virginia, Gowan Pamphlet has stood outside an archaeological excavation, jovially saying hello to passersby. He’s not the original Pamphlet: That one died in 1809, and was the first ordained African American in the United States. This Pamphlet—one of two “actor interpreters” who portray the enslaved Black man who helped found Williamsburg’s First Baptist Church—has reason to be happy. Behind him, archaeologists are slowly revealing the foundation of a historic church. Near this site, nearly 250 years ago,…