The Mason-Dixon Line 55-Mile Crownstone
1766 · Cypress Road, Millington, Kent County, Maryland, USA
Description
Set in 1766 by English astronomers Charles Mason and surveyor Jeremiah Dixon during their historic survey to resolve a bitter boundary dispute between the Lords Baltimore and the Penn family. This specific "crownstone" (Mile 55) is one of the rare special fifth-mile markers featuring carved family coats of arms, marking the precise north-south boundary between Maryland and Delaware (formerly part of Pennsylvania's lower counties). It stands as a masterpiece of 18th-century scientific surveying and American colonial history.
Note: Entries are drawn from historical records and community submissions. Where possible, sources are indicated on each page.
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Contributors:
Tom Naughton