Question: The Mason-Dixon Line originally settled a boundary dispute between which two colonies?
Answer: Pennsylvania and Maryland. The Penn and Calvert families hired English surveyors Charles Mason and Jeremiah Dixon to resolve the long-running dispute. Completed in 1767, the boundary was marked with stones bearing Pennsylvania’s crest on one side and Maryland’s on the other. Decades later, the line became symbolically associated with the divide between free and slave states.
