Maryland National Historic Landmarks

Accokeek Creek Site - 9/25/2021
Remarkable for its variety and concentration of human occupation sites, Accokeek included a palisaded village that was occupied from ca. A.D. 1300 to ca. 1630

Army Medical Museum and Library (Silver Spring) - 1/17/2017
Originally on the Mall in Washington DC, housing the Army Medical Museum, the first facility was razed and the museum moved to the current National Museum of Health and Medicine

B&O Transportation Museum and Mount Clare Station (Baltimore) - 10/20/2016
Located in the B&O Railroad's old Mount Clare Station and roundhouse, the site of the first regular railroad passenger service, the museum houses a significant collection of railroad treasures

Baltimore (Tug) (Baltimore) - 3/22/2015
Built and operated as a harbor inspection tug, capable of acting as an auxiliary fireboat and as a light icebreaker, she is the oldest operating steam tugboat in the U.S.

Bollman Truss Bridge (Savage) - 10/17/2016
The 1852 double-span iron truss bridge is the sole surviving example of a revolutionary design in the history of American bridge engineering

Brice House (Annapolis) - 4/21/2017
One of three similar preserved 18th century Georgian style brick houses in Annapolis; it is a five-part brick mansion with a large central block and flanking pavilions with connecting hyphens

Carrollton Viaduct (Baltimore) - 10/20/2016
Build in 1829, the first stone masonry bridge built for railroad use in the U.S., and one of the world's oldest railroad bridges still in use for rail traffic

Casselman Bridge, National Road (Grantsville) - 5/27/2016
Constructed in 1813 to aid in the westward movement through the frontier wilderness; a small portion of the original National Road still exists at the approaches

Chase-Lloyd House (Annapolis) - 4/21/2017
One of the first brick three-story Georgian mansions to be built in the Thirteen Colonies, and is one of the finest examples of the style

Chestertown Historic District (Chestertown) - 9/20/2014
This was the chief port for tobacco and wheat on the Eastern Shore of Maryland between 1750 and 1790, and has a collection of more than fifty Georgian style town houses

Clara Barton House (Glen Echo) - 9/20/1996
The Glen Echo home of the American pioneer teacher, nurse, and humanitarian who was the founder of the American Red Cross

College of Medicine of Maryland (Baltimore) - 10/20/2016
Also known as Davidge Hall, the Delorme design building has been in continuous use for medical education since 1813, the oldest such structure in the U.S.

Colonial Annapolis Historic District (Annapolis) - 11/8/2008
Capital of both the Colony and the State, and one of the first planned cities in colonial America

Edgar Allan Poe House (Baltimore) - 10/20/2016
The home, owned by his Aunt, of the writer from 1833 to 1835

Ellicott City Station (Ellicott City) - 5/26/2016
The terminus of the Baltimore and Ohio Railroad line from Baltimore to Ellicott's Mills, now the oldest remaining passenger train station in the U.S.

Elmer V. McCollum House (Baltimore) - 4/21/2017
Significant for its association with the Johns Hopkins University nutritional disease researcher, who lived in the house from 1929 to 1939

First Unitarian Church (Baltimore)- 10/20/2016
Dedicated in 1818, the domed cube church was the first building erected for Unitarians in the U.S.

Fort Frederick - 5/27/2016
A star fort active in the French and Indian War and the Revolutionary War

Frieda Fromm-Reichmann Cottage (Rockville) - 5/27/2022
Built in 1936 to house the residence and professional office of one of the leading psychoanalysts at the Chestnut Lodge psychiatric hospital, on whose grounds it stood

Gaithersburg Latitude Observatory (Gaithersburg) - 9/24/2021
Established in 1899 as part of a system of six International Latitude Observatories to precisely measure the wobble of the Earth's rotating axis

Greenbelt (Greenbelt) - 10/17/2016
Preserves the center of one of the few examples of the Garden City Movement in the U.S.

H. L. Mencken House (Baltimore) - 10/20/2016
The Italianate brick row house was the 1883-1956 home of the Baltimore Sun journalist and author

Habre-de-Venture - 7/25/1997
This is the 1770 home and property of Thomas Stone, one of the 56 signers of the United States Declaration of Independence

Hammond-Harwood House (Annapolis) - 4/21/2017
One of the premier colonial houses remaining in America from the British colonial period (1607–1776)

Henry August Rowland House (Baltimore) - 10/20/2016
The three story red-brick rowhouse is significant for its association with the physicist, first president of the American Physical Society

Homewood (Baltimore) - 4/21/2017
The Estate was offered as a wedding gift in 1800 by Charles Carroll of Carrollton, the longest surviving signer of the Declaration of Independence, to his son Charles Carroll Jr.

Ira Remsen House (Baltimore) - 10/20/2016
The typical Baltimore row house was the home of the Johns Hopkins University president from 1901 to 1925

Kennedy Farm (Sharpsburg) - 5/26/2016
Also known as John Brown's Headquarters and Kennedy Farmhouse, the log, stone and brick building is where John Brown planned and began his raid on Harpers Ferry

Lightship No. 116, Chesapeake (Baltimore) - 10/19/2016
The light vessel was built in SC and launched in 1930, leaving service in the Chesapeake in 1950

London Town Publik House (Woodland Beach) - 4/21/2017
A former Colonial tavern; completed in 1764, it is one of the best-preserved examples of a colonial-era brick tavern house

Maryland Statehouse (Annapolis) - 11/8/2008
Dating from 1772, the oldest state capitol in continuous legislative use and distinctive as being topped by the largest wooden dome in the U.S. constructed without nails

Minor Basilica of the Assumption of the Blessed Virgin Mary (Baltimore) - 10/20/2016
The Latrobe-design cathedral was the first Roman Catholic cathedral built in the U.S.

Monocacy Battlefield - 9/20/1996
The site of the Civil War Battle of Monocacy fought on July 9, 1864, one of the last the Confederates would carry out in Union territory

Montpelier Mansion (Laurel) - 3/20/2015
This is a 1780s, five-part Georgian style home on what was once a slave plantation of about 9,000 acres

Mount Clare (Baltimore) - 10/20/2016
The Georgian-style mansion, built in 1763 by barrister Charles Carroll the Barrister, is the oldest Colonial-era structure in Baltimore

Mount Royal Station (Baltimore) - 10/20/2016
The B&O Railroad's third train station in Baltimore and in 1896 the first station in the world to have electrified passenger trains

Mount Vernon Place Historic District (Baltimore) - 10/20/2016
One of the Baltimore’s oldest neighborhoods and originally the home to the city's most wealthy and fashionable families

Old Lock Pump House, Chesapeake and Delaware Canal (Chesapeake City) - 9/20/2014
The site preserves a feature of the old canal, which relied on locks and pumps to move vessels over the low divide of the Delmarva Peninsula between Chesapeake Bay and Delaware Bay

Peale Museum (Baltimore) - 10/19/2016
Opening in 1786, the first building in the Western Hemisphere to be designed and built specifically as a museum

Peggy Stewart House (Annapolis) - 4/21/2017
Also known as the Rutland-Jenifer-Stone House, the 1761 Georgian style house is associated with Daniel of St. Thomas Jenifer, the last agent of Maryland's early proprietors and a signer of the U.S. Constitution

Phoenix Shot Tower (Baltimore) - 10/19/2016
In 1828 the tallest structure in the U.S., it was used to manufacture short by dropping molten lead into water

Rachel Carson House (Colesville) - 5/27/2022
Built in 1956, this typical suburban ranch-style house was where the writer wrote her classic work Silent Spring in 1962

Riversdale Mansion (Riverdale)- 4/13/2015
This is a five-part, large-scale late Georgian mansion with Federal interior, built between 1801 and 1807

Schifferstadt (Frederick) - 9/25/2021
Built in 1758, it is one of the nation's finest examples of German-Georgian colonial architecture

Sheppard and Enoch Pratt Hospital and Gatehouse (Baltimore) - 4/21/2017
Founded in 1853, one of the oldest private psychiatric hospitals in the U.S., with buildings designed by Calvert Vaux, and Gothic gatehouse designed by Thomas and James Dixon

Sion Hill (Havre de Grace) - 3/20/2015
The high-style Federal house, started in 1785, was the home a family of prominent officers of the U.S. Navy

St. Mary’s Seminary Chapel (Baltimore) - 10/20/2016
Completed in 1808, the Godefroy design is the oldest Neo-Gothic style church in the U.S., built for the French Sulpician priests of the seminary

Star-Spangled Flag House (Baltimore) - 10/19/2016
The home of Mary Pickersgill when she moved to Baltimore in 1806, and the location where she sewed the "Star Spangled Banner," the garrison flag that flew over Fort McHenry

Thomas Viaduct - 10/17/2016
Upon its completion in 1835, this was the largest bridge in the U.S. and the country's first multi-span masonry railroad bridge to be built on a curve

United States Naval Academy (Annapolis) - 8/1963
A four-year coeducational federal service academy, it is the second-oldest of the U.S five service academies, and educates officers for commissioning primarily into the U.S. Navy and Marine Corps

USCGC Taney (Baltimore) - 10/19/2016
A Coast Guard High Endurance Cutter (Treasury-class), notable as the last ship floating that fought in the attack on Pearl Harbor

USS Constellation (Frigate) (Baltimore) - 11/5/2006
A sloop-of-war constructed in 1854, the last sail-only warship designed and built by the U.S. Navy and the second U.S. Navy ship to carry the name

USS Torsk (Baltimore) - 10/19/2016
One of two Tench-class WWII submarines still located in the U.S., having made two war patrols off Japan, sinking one cargo vessel and two coastal defense frigates

Washington Aqueduct - 9/25/2021
One of the first major aqueduct projects in the U.S. it provides the public water supply system serving Washington, D.C. and parts of its suburbs

William Henry Welch House (Baltimore) - 10/20/2016
A three-story rowhouse notable as the 1891-1908 residence of one of the "Big Four" founding professors at Johns Hopkins Hospital

William Paca House (Annapolis) - 11/8/2008
An 18th century Georgian mansion and home to the signatory of the Declaration of Independence and three-term Governor of Maryland