Mount Airy
D.C., Maryland, USA
9640 Rosaryville Road, Upper Marlboro, MD, USA
MARKER
VISITOR INFORMATION
Free roadside historical marker; visible from the public right-of-way at any time. There are no staffed hours or ticket requirements.
A roadside historical marker, free to read at any time. There is no parking area or restroom at the marker itself, so pull over only where it is safe to do so.
SITE FEATURES
HISTORIC SITES NEARBY
Nearby Historic Sites
miles
Landmark

WHO WAS HERE
3
About Mount Airy
This site forms part of the Revolutionary-era landscape of MD - Prince George's. Its connection is primarily local, logistical, political, or commemorative; no specific major military engagement at the location is firmly documented.
A commemorative marker is recorded for Mount Airy. The record does not establish what historic fabric survives or who maintains the site.
History happened here at Mount Airy
Mount Airy is associated with February 3, 1774 and the history of George Washington. This site forms part of the Revolutionary-era landscape of MD - Prince George's. Its connection is primarily local, logistical, political, or commemorative; no specific major military engagement at the location is firmly documented. Site of the Calvert Plantation, Mount Airy. Here George Washington attended the wedding of his stepson Jacky Custis to Eleanor "Nelly" Calvert.
What stands here today is commemorative evidence: a marker directing attention to a historic place or event. Its installation belongs to a later period of public remembrance, while its subject belongs to the earlier history described above. This distinction matters when evaluating authenticity and preservation. The marker may not occupy the exact footprint of every action it recalls, but it anchors the story to the closest practical viewing point and encourages the surrounding landscape to be read critically.
A house or homesite places public history within a private and domestic setting. Such properties could support farming, business, hospitality, political discussion, military lodging, or family networks, even when no formal institution operated there. Their historical value often comes from the people who lived or stayed on the land and from the decisions, labor, and relationships centered there. The setting therefore links biography and household life to events unfolding beyond the property boundaries.
This episode is best understood as part of the history of George Washington. That theme extended far beyond a single encounter or individual, linking local choices to regional networks and larger outcomes. The physical setting helps explain the possibilities and limits facing the people involved. Distance, terrain, transportation, resources, and public support all mattered. By locating the story here, the marker preserves evidence of how broad historical developments were experienced and shaped at ground level.
No historic place exists in isolation. Nearby destinations in the same campaign, travel corridor, community, or political network can clarify the sequence of events and the distances involved. Comparing this marker with related sites helps test the compressed story told at one stop and reveals how many small decisions and movements accumulated into larger historical outcomes.
Taken together, the documentary account, the marker, and the surviving setting give this place its significance. The site is most informative when approached as part of a connected landscape rather than as an isolated point. Changes in roads, buildings, vegetation, and land use may obscure the original scene, but location still helps explain relationships among people and events. Preserving the marker and improving its interpretation keeps a locally grounded piece of history available for comparison with maps, records, archaeology, and other nearby sites.
PEOPLE WHO LIVED HERE
PEOPLE WHO DIED HERE
EXTERNAL LINKS
Historical Marker Database: https://www.hmdb.org/m.asp?m=3661
Library of Congress: https://www.loc.gov/item/md0855/
mountvernon.org: https://www.mountvernon.org/library/digitalhistory/digital-encyclopedia/article/john-parke-custis
Identity/date: Mount Airy here is the Calvert home/Dower House at Rosaryville, documented by HABS. The row's HMDB link m201590 instead describes a Civil War marker in Carroll County; m3661 is the relevant Rosaryville marker. Its inscription gives February 4, 1774 for the Custis–Calvert wedding, while Mount Vernon's biography gives February 3; retain this discrepancy for date review.
Accessed 2026-09-30

.jpg?width=800)