Frederick County is a county in Maryland, United States. As of the 2020 U.S. census, the population was 271,717. The county seat is Frederick.
Riverdale Park, formerly known and often referred to as Riverdale, is a semi-urban town in Prince George's County, Maryland, United States, a suburb in the Washington, D.C., metropolitan area. The population was 6,955 as of the 2010 U.S. Census. The population as of 2019 is approximately 7,304, according to the US Census Bureau and other entities.
Baron Baltimore, of Baltimore, County Longford, was a title in the Peerage of Ireland. It was created in 1625 and ended in 1771, upon the death of its sixth-generation male heir, aged 40. Holders of the title were usually known as Lord Baltimore for short.
Charles Calvert, 5th Baron Baltimore, was a British nobleman and Proprietary Governor of the Province of Maryland. He inherited the title to Maryland aged just fifteen, on the death of his father and grandfather, when the colony was restored by the British monarchy to the Calvert family's control, following its seizure in 1688. In 1721 Charles came of age and assumed personal control of Maryland, travelling there briefly in 1732. For most of his life, he remained in England, where he pursued an active career in politics, rising to become Lord of the Admiralty from 1742 to 1744. He died in 1751 in England, aged 52.
Eleanor Josephine Medill "Cissy" Patterson, Countess Gizycki was an American journalist and newspaper editor, publisher and owner. Patterson was one of the first women to head a major daily newspaper, the Washington Times-Herald in Washington, D.C.
George Washington Parke Custis was an American plantation owner, antiquarian, author, and playwright. His father John Parke Custis was the stepson of George Washington. He and his sister Eleanor grew up at Mount Vernon and in the Washington presidential household.
Charles Benedict Calvert was an American politician who was a U.S. Representative from the sixth district of Maryland, serving one term from 1861 to 1863. He was an early backer of the inventors of the telegraph, and in 1856 he founded the Maryland Agricultural College, the first agricultural research college in America, now known as the University of Maryland. He was a direct descendant of the Lords Baltimore, proprietary governors of the Province of Maryland from 1631 until 1776.
Eleanor Parke Custis Lewis, known as Nelly, was a granddaughter of Martha Washington and a step-granddaughter and adopted daughter of George Washington.
John Parke Custis was an American planter. He was a son of Martha Washington and stepson of George Washington.
Located south of Laurel in Prince George's County, Maryland, United States, Montpelier Mansion is a five-part, Georgian style plantation house most likely constructed between 1781 and 1785. It has also been known as the Snowden-Long House, New Birmingham, or simply Montpelier. Built by Major Thomas Snowden and his wife Anne, the house is now a National Historic Landmark operated as a house museum. The home and 70 acres (28 ha) remain of what was once a slave plantation of about 9,000 acres (3,600 ha).
Maryland Route 231 (MD 231) is a state highway in the U.S. state of Maryland. The state highway runs 16.39 miles (26.38 km) from Olivers Shop Road near Hughesville east to MD 765 in Prince Frederick. MD 231 crosses the Patuxent River on the Benedict Bridge, which connects Benedict in eastern Charles County with Hallowing Point in central Calvert County. The highway directly connects MD 5 in Hughesville with MD 2/MD 4 in Prince Frederick. MD 231 was constructed from Hughesville to Benedict and from Hollowing Point to Prince Frederick in the early 1920s. The portion of the state highway west of Hughesville was built in the early 1930s, about the same time ferry service began between Benedict and Hallowing Point. The Benedict Bridge was started in 1950 and was completed in 1952; the bridge remained the southernmost crossing of the Patuxent River for 25 years. The bridge was tolled from its opening until around 1955. MD 231 was reconstructed between Hughesville and Prince Frederick in the mid- to late 1950s to better serve intercounty traffic.
Riversdale, is a five-part, large-scale late Georgian mansion with superior Federal interior, built between 1801 and 1807. Also known as Baltimore House, Calvert Mansion or Riversdale Mansion, it is located at 4811 Riverdale Road in Riverdale Park, Maryland, and is open to the public as a museum.
Rosaryville State Park is a public recreation area with historical features located three miles southeast of Joint Base Andrews in Rosaryville, Prince George's County, Maryland. The state park includes the restored Mount Airy Mansion, which was formerly operated as an event facility, as well as hiking, biking and equestrian trails for day-use.
Calvert Hills Historic District is a national historic district in College Park, Prince George's County, Maryland. It is roughly bounded on the north by Calvert Road, on the east by the Green Line metrorail corridor, on the south by the northern boundary of Riverdale Park, and on the west by Baltimore Avenue. It does not include Calvert Park on the southeast corner. Primarily a middle-class single-family residential neighborhood, it also includes some apartment houses as well as the College Park Post Office, a contributing property at 4815 Calvert Road.
Martha Parke Custis Peter was a granddaughter of Martha Dandridge Washington and a step-granddaughter of George Washington.
Eleanor Calvert Custis Stuart, born Eleanor Calvert, was a prominent member of the wealthy Calvert family of Maryland. Upon her marriage to John Parke Custis, she became the daughter-in-law of Martha Dandridge Custis Washington and the step-daughter-in-law of George Washington. Her portrait hangs today at Mount Airy Mansion in Rosaryville State Park, Maryland.
Benedict Swingate Calvert was a planter, politician and a Loyalist in Maryland during the American Revolution. He was the son of Charles Calvert, 5th Baron Baltimore, the third Proprietor Governor of Maryland (1699–1751). His mother's identity is not known, though one source speculates that she was Melusina von der Schulenburg, Countess of Walsingham. As he was illegitimate, he was not able to inherit his father's title or estates, which passed instead to his half brother Frederick Calvert, 6th Baron Baltimore (1731–1771). Benedict Calvert spent most of his life as a politician, judge and planter in Maryland, though Frederick, by contrast, never visited the colony. Calvert became wealthy through proprietarial patronage and became an important colonial official, but he would lose his offices and his political power, though not his land and wealth, during the American Revolution.
Elizabeth Calvert was the daughter of Maryland Governor Captain Charles Calvert and Rebecca Gerard, and a wealthy heiress in colonial Maryland. Her parents died when she was young, leaving her their substantial fortune. In 1748, aged 17, she married her cousin Benedict Swingate Calvert, a Loyalist politician and planter and the illegitimate son of Charles Calvert, 5th Baron Baltimore. Benedict's connections to the ruling Calvert family allowed him to benefit from considerable proprietarial patronage, until the American Revolution saw the overthrow of British rule and the end of Calvert power in Maryland. Benedict and Elizabeth had to pay triple taxes after the war's end but, unlike many loyalists, their lands and fortune remained unconfiscated.
Rosalie Stier Calvert was a plantation owner and correspondent in nineteenth century Maryland. A collection of her letters, titled Mistress of Riversdale, The Plantation Letters of Rosalie Stier Calvert, was published by the Johns Hopkins University Press in 1991. The letters range in date from 1795 to 1821, and illuminate the life of Calvert's plantation household, including the events leading up to and during the War of 1812.
George Calvert, was a plantation owner and slaveholder in late eighteenth- and early nineteenth-century Maryland. His plantation house, Riversdale plantation, also known as the Calvert Mansion, is a five-part, large-scale late Georgian mansion with superior Federal interior, built between 1801 and 1807, and was designated a National Historic Landmark in 1997. Calvert's wife, the Belgian-born heiress Rosalie Stier Calvert, was an indefatigable correspondent whose letters, titled Mistress of Riversdale, The Plantation Letters of Rosalie Stier Calvert, was published by the Johns Hopkins University Press in 1991. The letters range in date from 1795 to 1821, and illuminate the life of the Calverts' plantation household during the events leading up to and during the War of 1812.
