- Historic St Mary's City - Visitor Center
18559 Hogaboom Lane, Saint Marys City, MD, 20686(240) 895-4990
- Boonsboro Historical Society
323 North Main Street, Boonsboro, MD, 21713(301) 432-5889
- The Menare Foundation
12535 Milestone Manor Lane, Germantown, MD, 20876(301) 601-8700
- Compton Raymond L
7945 Wormans Mill Road, Frederick, MD, 21701(301) 694-0440
- Frederick Woman's Civic Club Inc
Frederick, MD, 21701(301) 694-9660
- Rubin Charles Rl Estate
617 West Patrick Street, Frederick, MD, 21701(301) 695-3577
- Hager House & Museum
110 Key Street, Hagerstown, MD, 21740(301) 739-8393
- Washington County Historical Society
Beaver Creek Church Rd, Hagerstown, MD, 21740(301) 797-0006
- Smithsburg Historical Society Inc
9 North Main Street, Smithsburg, MD, 21783(301) 824-7154
- National Railway Historical Society-Potomac Chaptr
Kensington, MD, 20895(301) 946-9461
- Historic Annapolis Foundation
18 Pinkney Street, Annapolis, MD, 21401(410) 267-7619
- Baltimore Heritage Inc
11 West Chase Street, Baltimore, MD, 21201(410) 332-9992
- Gibson Island Historical Society
Gibson Island, MD, 21056(410) 437-5270
- Friends of P F I at MT Ida
Ellicott City, MD, 21043(410) 465-8500
- USS Constellation
1 West Pratt Street, Baltimore, MD, 21201(410) 539-1797
- Strawbridge Shrine Inc
2650 Strawbridge Lane, New Windsor, MD, 21776(410) 635-2600
- The Principio Furnace Foundation Inc
1723 Principio Furnace Road, Perryville, MD, 21903(410) 642-9213
- Twin Oaks Historical Preservation Carriage House
5910 Oak Twin Court, Linthicum Heights, MD, 21090(410) 684-3332
- Maryland Historical Society
201 West Monument Street, Baltimore, MD, 21201(410) 685-3750
- Babe Ruth Museum
216 Emory Street, Baltimore, MD, 21230(410) 727-1539
- Historical Society Queen Anne's County
124 South Commerce Street, Centreville, MD, 21617(410) 758-3010
- Maryland House & Garden Pilgrimage
1105 Providence Road, Towson, MD, 21286(410) 821-6933
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- Thurmont Historical Society
11 North Church Street, Thurmont, MD, 21788(301) 271-1860
- Prince George's County Historical Society
5626 Bell Station Road, Glenn Dale, MD, 20769(301) 464-0590
- Historical Society Of Frederick Co Inc
24 East Church Street, Frederick, MD, 21701(301) 663-1140
- Spring Bank Inn
7945 Wormans Mill Road, Frederick, MD, 21701(301) 694-0440
- Historic Properties Associate Real Estate Teams
Frederick, MD, 21701(301) 695-3577
- Air Force Historical Foundation
Andrews Air Force Base, MD, 20762(301) 736-7563
- Montgomery County Historical Society - Museums And Library
Rockville, MD, 20850(301) 762-1492
- Bowie Government - Museums
12207 Tulip Grove Drive, Bowie, MD, 20715(301) 809-3089
- Spruce Forest Artisan Village Inc
177 Casselman Road, Grantsville, MD, 21536(301) 895-3332
- Historic Medley District Inc
Gaithersburg, MD, 20877(301) 972-8588
- Aberdeen Room Archives & Museum
18 Howard Street, Aberdeen, MD, 21001(410) 273-6325
- Maryland Steeam Historical Society
5415 Arcadia Avenue, Upperco, MD, 21155(410) 374-1332
- Historic Ellicott City Inc
8267 Main Street, Ellicott City, MD, 21043(410) 461-6908
- Patapsco Female Institute Historic Park
Ellicott City, MD, 21043(410) 465-8500
- Constellation Foundation Inc
1 West Pratt Street, Baltimore, MD, 21201(410) 539-1797
- Acker Charles & Ginna
New Windsor, MD, 21776(410) 635-2600
- Fairmount Academy Historical Associates
Upper Fairmount, MD, 21867(410) 651-2145
- Museum & Library Of Maryland History
201 West Monument Street, Baltimore, MD, 21201(410) 685-3750
- Maryland Historical
601 North Howard St, Baltimore, MD, 21218(410) 685-6195
- Catonsville Historical Society Inc
1824 Frederick Road, Catonsville, MD, 21228(410) 744-3034
- National Historic Seaport Of Baltimore
802 S Caroline St, Baltimore, MD, 21231(410) 783-1490
- Chipman Foundation
321 Broad Street, Salisbury, MD, 21801(410) 860-9290
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