John Bowman of Old Dominion Realty shows a late-18th century house in Port Republic to David Shank of Mount Crawford and Marta Ruiz, 16, a Spanish foreign exchange student the Shanks are hosting. John Bowman of Old Dominion Realty shows a late-18th century house in Port Republic to David Shank of Mount Crawford and Marta Ruiz, 16, a Spanish foreign exchange student the Shanks are hosting.