Question: What century were the group of American poets associated with New England that Henry Wadsworth Longfellow popular among readers?

Context paragraphs:
Wadsworth Hall: Wadsworth Hall, also known as the Peleg Wadsworth House, is a historic house at the end of Douglas Road in Hiram, Maine, United States.  A massive structure for a rural setting, it was built for General Peleg Wadsworth between 1800 and 1807 on a large tract of land granted to him for his service in the American Revolutionary War.  Wadsworth was the leading citizen of Hiram, and important town meetings took place at the house.  He was also the grandfather of poet Henry Wadsworth Longfellow, who visited the estate as a youth.  The house remains in the hands of Wadsworth descendants.  The house was listed on the National Register of Historic Places in 1974.

Henry Wadsworth Longfellow Memorial: Henry Wadsworth Longfellow is a bronze statue, by William Couper, and Thomas Ball.  The statue depicts American poet Henry Wadsworth Longfellow.  It is located at the intersection of M Street and Connecticut Avenue, N.W. Washington, D.C. and was dedicated on May 7, 1909.

Ernest Wadsworth Longfellow: Ernest Wadsworth Longfellow (1845–1921) was an artist in Boston, Massachusetts, and New York.  He was the son of Henry Wadsworth Longfellow.

Alexander Wadsworth (landscape designer): Alexander Wadsworth (1806-1898) was an American landscape architect and surveyor, best known for his work on the Mount Auburn Cemetery in Cambridge, Massachusetts.  Born in Hiram, Maine, Wadsworth studied civil engineering at Gardiner Lyceum before beginning his work as a surveyor in the Boston, Massachusetts area.  He collaborated with Henry A. S. Dearborn on the topographic details of Mount Auburn Cemetery, and had a successful career designing parks and suburban subdivisions, primarily in eastern Massachusetts.  Wadsworth was a cousin of poet Henry Wadsworth Longfellow.

Alexander Wadsworth Longfellow Jr.: Alexander Wadsworth Longfellow Jr. (August 18, 1854, Portland, Maine – February 16, 1934, Portland) was an American architect and nephew of poet Henry Wadsworth Longfellow.

Longfellow, Minneapolis: Longfellow is a defined community in Minneapolis, Minnesota which includes five smaller neighborhoods inside of it: Cooper, Hiawatha, Howe, Seward, and Longfellow.  Grouped with South Minneapolis between the city's eastern border with the Mississippi River and the Metro Blue Line , Longfellow takes its name from Longfellow neighborhood which in turn is named after Henry Wadsworth Longfellow.  The renowned American poet incorporated elements into his poem "The Song of Hiawatha" from Henry Schoolcraft's accounts of native Dakota lore in Minnesota which included Minnehaha Falls in Longfellow's southern tip.  The early reference of Highway 55 as Hiawatha Avenue, along the west border, may have influenced the naming decision when community borders were drawn in the 1960s.  Hiawatha Avenue is the main thoroughfare leading north into Downtown Minneapolis and south to the Minneapolis-Saint Paul Airport.

Henry Wadsworth Longfellow Monument: The Henry Wadsworth Longfellow Monument is a public monument in Portland, Maine's West End.  Located on the corner of State and Congress Street, it honors poet Henry Wadsworth Longfellow, who was born in Portland in 1807.  The intersection built around the monument is known as Longfellow Square.

Stephanie Longfellow: Stephanie Longfellow was an American stage and film actress who appeared in ca. 40 silent films between 1909 and 1911.  Longfellow was a popular ingenue for D.W. Griffith, and starred in 16 of his short films.  She also starred in films of Mack Sennett and Frank Powell.  In 1909, the Dubuque Telegraph-Herald called Longfellow a star of "singular beauty and charm."  She was the grand-niece of the poet Henry Wadsworth Longfellow.

Henry Wadsworth Longfellow: Henry Wadsworth Longfellow (February 27, 1807 – March 24, 1882) was an American poet and educator whose works include "Paul Revere's Ride", "The Song of Hiawatha", and "Evangeline".  He was also the first American to translate Dante Alighieri's "Divine Comedy", and was one of the five Fireside Poets from New England.

Fireside Poets: The Fireside Poets — also known as the Schoolroom or Household Poets — were a group of 19th-century American poets associated with New England.  These poets were very popular among readers and critics both in the United States and overseas.  Their domestic themes and messages of morality presented in conventional poetic forms deeply shaped their era until their decline in popularity at the beginning of the 20th century.

Supporting paragraphs: Henry Wadsworth Longfellow Fireside Poets
Answer: 19th-century