The territorial era of Minnesota lasted from the Louisiana Purchase in 1803 to Minnesota's achieving statehood in 1858.
 The Minnesota Territory itself was formed only in 1849 but the area had a rich history well before this.
 Though there was a long history of European presence in the area before 19th century, it was during the 19th century that the United States began to establish a firm presence in what would become Minnesota.
Rolette County is a county located in the U.S. state of North Dakota.
 As of the 2010 census, the population was 13,937.
 Its county seat is Rolla.
 The county was created by the 1872-73 territorial legislature and named for Joseph Rolette, Jr., a fur trader and politician from Pembina.
 The county government was first organized on October 14, 1884.
 Before becoming Rolla, the county seat was Dunseith from 1884 to 1885 and St. John from 1885 to 1889.
Joseph Rolette (23 October 1820 – 16 May 1871) was a well-known American fur trader and politician during Minnesota's territorial era and the Civil War.
 His father was Jean Joseph Rolette, often referred to as Joe Rolette the elder, a French-Canadian and a trader himself.
 Joseph Rolette’s mother was Jane Fisher, who married Joe Rolette, Sr. in 1818 when she was either 13 or 14 years old.
 Jane's relatives took young Joseph to New York.
 Joseph's parents never divorced as they were Catholics, but the couple became separated in 1836.
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 As part of the settlement, Joe Senior built what is today known as the Brisbois House for his estranged wife on Water Street, St. Feriole Island, Prairie du Chien, WI.
Hypolite Dupuis (October 16, 1804July 1879) was a fur trader with the American Fur Company.
 He was born in LaPrairie de la Madeleine, near present-day Montreal in lower Canada.
 By 1831 he had moved to what would become the Minnesota Territory to work at Joseph Renville’s Lac qui Parle trading post.
 He moved to Mendota, Minnesota around 1840 and built a house on the property of Henry Hastings Sibley.
 Dupuis worked as a clerk for Sibley and managed the company store.
 He married Angelique Renville, daughter of Joseph Renville, and they had eight children.
Russel Farnham (1784 – October 23, 1832) was an American frontiersman, explorer, and fur trader.
 An agent of John Jacob Astor's American Fur Company, he oversaw fur trading in the Great Lakes region throughout the 1810s and 1820s.
 A member of the Pacific Fur Company headed by Wilson P. Hunt during 1810–1812, he is also the first American to semi-circumnavigate the world traveling by foot from Fort Astoria (now Astoria, Oregon) to St. Petersburg, Russia, to New York City.
Robert Stuart (February 19, 1785 – October 28, 1848) was a Scottish-born American fur trader best known as a member of the first European-American party to cross South Pass during an overland expedition from Fort Astoria to Saint Louis in 1811.
 He was a member of the North West Company (NWC) until recruited by John Jacob Astor to develop the new Pacific Fur Company, which was based at Fort Astoria, on the coast of present-day Oregon.
 Astor intended the venture to develop a continent-wide commercial empire in fur trading.
Charles Larpenteur, born 1803, died 1872, was an American fur trader, whose memoir and diary frequently have been used as a source to fur trade history.
The Sibley Historic Site is the site of Henry Hastings Sibley's home, who was the regional manager of the American Fur Company and Minnesota's first governor.
 It is one of the 26 historical sites that are operated by the Minnesota Historical Society.
 Located in what is now the city of Mendota, the site consists of four limestone buildings and a large lawn area.
 Three of the buildings are open for touring, including a fur company cold store from 1843 and the 1840 home of fur trader and hotelier Jean-Baptiste Faribault.
Fort Lisa (1812–1823) was established in 1812 in what is now North Omaha in Omaha, Nebraska by famed fur trader Manuel Lisa and the Missouri Fur Company, which was based in Saint Louis.
 The fort was associated with several firsts in Nebraska history: Lisa was the first European farmer in Nebraska; it was the settlement by American citizens set up in the then-recent Louisiana Purchase; Lisa's wife (his third) was the first woman resident of European descent in Nebraska; and the first steamboat to navigate Nebraska waters, the "Western Engineer", arrived at Fort Lisa in September 1819.
Jean Joseph Rolette (September 24, 1781 – December 3, 1842), often known as Joseph Rolette, was a prominent fur trader and member of the Mackinac Company who operated a trading post in Prairie du Chien, Wisconsin.

Question: What era was a well-known American fur trader and politician alive, who's mother was Jane Fisher, who married Joe Rolette, Sr, that lasted from the Louisiana Purchase in 1803 to Minnesota's achieving statehood in 1858?
Answer: territorial era of Minnesota