Question: What historic house and museum is located in the largest city in the U.S. state of Maine?

Context paragraphs:
Colbert House (Ilwaco, Washington): The Colbert House is a historic house museum owned by Washington State Parks and located in Ilwaco, Washington, at the corner of Spruce and Quaker streets.  The house was originally built in 1872 and was moved to its current site in 1883.  The house was owned by a fishing family and was restored in 1994 to a late 19th-century appearance with Colbert family furnishings and decorative items.  Following its restoration, the house was operated by Cape Disappointment State Park as a historic house museum that was open by appointment only.  In 2009, the Long Beach Area Parks Management Plan deemed the operation of the building as a house museum to be "not feasible at this time" and that "State Parks will preserve the building until such time as a feasible and sustainable use becomes apparent."

Benjamin C. Wilder House: The Benjamin C. Wilder House is an historic house at 1267 Main Street (Maine State Route 164) in Washburn, Maine.  Built about 1852, it is a well-preserved example of mid-19th century vernacular architecture in northern Aroostook County, built in the first decade after widespread settlement began of the area.  The house was listed on the National Register of Historic Places in 1987.  It is now owned by the local Salmon Brook Historical Society and operated as a historic house museum.

Parson Smith House: The Parson Smith House is a historic house on River Road in southern Windham, Maine.  Built in 1764 and virtually unaltered since, it is one of the state's finest examples of Colonial Georgian architecture.  It was listed on the National Register of Historic Places in 1973.  Now a private residence, it was for 40 years a historic house museum owned and operated by the Society for the Preservation of New England Antiquities.

H. B. Ailman House: The H. B. Ailman House is a historic house located at 314 W. Broadway in Silver City, New Mexico.  Prospector Henry B. Ailman had the house built using his profits from the Naiad Queen Silver Mine in Georgetown; his business partner H. M. Meredith built an identical house next door, which has since been demolished.  The brick Victorian house features a 2 ⁄ -story square turret, which Ailman used to watch for Apache attacks on Silver City.  Ailman and Meredith attempted to found a bank in Silver City, but it failed in 1887; Ailman's house changed owners several times in the following decades.  The city took ownership of the house in 1926 and made it the new City Hall.  The house became a firehouse after a new city hall was constructed.  In 1967, the Silver City Museum opened in the house.  The property today remains in operation as a historic house museum.

Wadsworth-Longfellow House: The Wadsworth-Longfellow House is a historic house and museum in Portland, Maine, United States.  It is located at 489 Congress Street and is operated by the Maine Historical Society.  It was designated a National Historic Landmark in 1962, and administratively added to the National Register of Historic Places in 1966.  The house is open daily to public from May through October (half days on Sundays).  An admission fee is charged.

Hamilton House (South Berwick, Maine): The Jonathan Hamilton House, also known as the Hamilton House, is a historic house at 40 Vaughan's Lane in South Berwick, Maine.  Built between 1787 and 1788 by a merchant from Portsmouth, New Hampshire, this National Historic Landmark is a little-altered and high quality late Georgian country house.  Acquired by preservationist friends of South Berwick native Sarah Orne Jewett at the turn of the 20th century, it is now a historic house museum owned by Historic New England, open for tours between June and October.

House of Wickersham (Juneau, Alaska): The House of Wickersham, also known as the Wickersham State Historic Site, is a historic house at 213 7th Street in the Chicken Ridge area of Juneau, Alaska.  It is a historic house museum operated by the state of Alaska, memorializing the life of James Wickersham (1857-1939), an influential political leader in Alaska in the early 20th century.  The house, a 2-1/2 story frame structure, was built in 1899 by Frank Hammond, owner of a mining company.  It was purchased by Wickersham in 1928 and remained his home until his death.  The house has been operated, informally at first by Wickersham's niece, as a museum since 1958.  The house was purchased by the state in 1984.

Portland, Maine: Portland is the largest city in the U.S. state of Maine, with a population of 66,937 as of 2016.  The Greater Portland metropolitan area is home to over half a million people, more than one-third of Maine's total population.  The Old Port district is frequented by tourists, while Portland Head Light is also a destination.  The city seal depicts a phoenix rising from ashes, which is a reference to the recoveries from four devastating fires.  Portland was named for the English Isle of Portland, and the city of Portland, Oregon, was in turn named after Portland, Maine.

Salome Sellers House: The Salome Sellers House is a historic house museum at 416 Sunset Road (Maine State Route 15A) in Deer Isle, Maine.  Its oldest portion dating to the 1770s, the house is locally distinctive as a well-preserved 19th-century Cape, and as the home of Salome Sellers, one of Deer Isle's longest-lived residents (1800-1909).  The house has been a museum property of the Deer Isle-Stonington Historical Society since 1960, and is believed to be the only house of its type in the state that is open as a museum.  It was listed on the National Register of Historic Places in 1983.

John A. North House: The John A. North House is a historic house museum and archives located in Lewisburg, Greenbrier County, West Virginia.  Currently, the North House is Greenbrier County's only historic house museum.  Since 1976, The Greenbrier Historical Society has operated within the North House, and in 1992 the North House was officially purchased by the Greenbrier Historical Society.  In 1992, the home officially became known as " North House Museum, Greenbrier Historical Society."

Supporting paragraphs: Wadsworth-Longfellow House Portland, Maine
Answer: The Wadsworth-Longfellow House