William Penn Annex East in Philadelphia in Philadelphia County, Pennsylvania — The American Northeast (Mid-Atlantic)
Charles Mason
Photographed By Frankie, June 20, 2015
1. Charles Mason Marker
Charles Mason
Surveyor - Astronomer - Scientist
April 1728 - October 25, 1786
English astronomer and surveyor who, with Jeremiah Dixon, laid out the Mason-Dixon Line - famous border between Maryland, Pennsylvania and Delaware - using little but the stars from God's Heavens, in the years 1763-1767.
Charles Mason was laid to rest at Christ Church Burial Ground on October 26, 1786, in a plot obtained by his good friend Benjamin Franklin from Church Warden Tench Coxe. The location of his grave in the burial grounds is unknown.
This original 1766 Pennsylvania-Maryland boundary stone, quarried in England, stood for two centuries upon the Mason-Dixon Line - and now honors the memory of its surveyor, Charles Mason.
This Plaque and Mason-Dixon Line Stone were dedicated August 31, 2013, by Surveyors Historical Society and the Mason-Dixon Line Preservation Partnership on behalf of surveyors, astronomers and scientists everywhere.
Topics. This historical marker is listed in these topic lists: Colonial Era • Science & Medicine. A significant historical month for this entry is April 1728.
Location. 39° 57.131′ N, 75° 8.898′ W. Marker is in Philadelphia, Pennsylvania, in Philadelphia
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Other nearby markers. At least 8 other markers are within walking distance of this marker. Major William Jackson - 40th Signer of the U.S. Constitution (here, next to this marker); John Inskeep (here, next to this marker); Thomas Smith (here, next to this marker); General Jacob Morgan, Esquire (a few steps from this marker); Matthew Clarkson (a few steps from this marker); William Henry Drayton (within shouting distance of this marker); Captain Anthony Palmer (within shouting distance of this marker); Benjamin Franklin Epitaph (within shouting distance of this marker). Touch for a list and map of all markers in Philadelphia.
Photographed By Frankie, June 20, 2015
2. Mason-Dixon Boundary Stone
Credits. This page was last revised on February 2, 2023. It was originally submitted on August 7, 2018. This page has been viewed 626 times since then and 57 times this year. Photos: 1, 2. submitted on August 7, 2018. • Bill Pfingsten was the editor who published this page.
