US Highway 41 (US 41) is a part of the United States Numbered Highway System that runs from Miami, Florida, to the Upper Peninsula of the US state of Michigan.
 In Michigan, it is a state trunkline highway that enters the state via the Interstate Bridge between Marinette, Wisconsin, and Menominee, Michigan.
 The 278.769 mi of US 41 that lie within Michigan serve as a major conduit.
 Most of the highway is listed on the National Highway System.
 Various sections are rural two-lane highway, urbanized four-lane divided expressway and the Copper Country Trail National Scenic Byway.
 The northernmost community along the highway is Copper Harbor at the tip of the Keweenaw Peninsula.
 The trunkline ends at a cul-de-sac east of Fort Wilkins State Park after serving the Central Upper Peninsula and Copper Country regions of Michigan.
The Copper Country strike of 1913–1914 was a major strike affecting all copper mines in the Copper Country of Michigan.
 The strike, organized by the Western Federation of Miners, was the first unionized strike within the Copper Country.
 It was called to achieve goals of shorter work days, higher wages, union recognition, and to maintain family mining groups.
 The strike lasted just over nine months, including the Italian Hall disaster on Christmas Eve, and ended with the union being effectively driven out of the Keweenaw Peninsula.
 While unsuccessful, the strike is considered a turning point in the history of the Copper Country.
Houghton ( ) is a city in the U.S. state of Michigan's Upper Peninsula and largest city in the Copper Country on the Keweenaw Peninsula.
 As of the 2010 census, the city population was 7,708.
 It is the county seat of Houghton County.
 It has been listed as one of the "100 Best Small Towns in America."
The Houghton County Courthouse is a government building located at 401 E. Houghton Street in Houghton, Michigan.
 It was designated a Michigan State Historic Site in 1974 and placed on the National Register of Historic Places in 1975.
James MacNaughton, also variously known as "the King of Houghton County", the "Czar of the Copper Country" or simply "Big Jim" (b. March 4, 1864) was the third and last known President and General Manager of the Calumet and Hecla Mining Company during the hate-filled Copper Country Strike of 1913–1914.
 In addition to the Calumet and Hecla Mining Company, MacNaughton was also the General Manager of the Ahmeek Mining Company, Allouez Mining Company, North Kearsarge mine, South Kearsarge mine, Tamarack Mining Company, Osceola Consolidated Copper Company, St. Louis Copper Company, Laurium Mining Company, La Salle Copper Company, Isle Royale Copper Company, Superior Copper Company, and the Centennial Copper Mining Company.
 MacNaughton also held a position as the Chairman of the Houghton County Board of Supervisors and the first chairman of Miscowaubik, a private business club headquartered in Calumet, Michigan.
Copper Island is a local name given to the northern part of the Keweenaw Peninsula (projecting northeastward into Lake Superior at the western end of the Upper Peninsula of Michigan, United States of America), separated from the rest of the Keweenaw Peninsula by Portage Lake and the Keweenaw Waterway.
The Lac La Belle and Calumet Railroad was an American, narrow gauge railroad that operated in the Keweenaw Peninsula, or the extreme northern Upper Peninsula of Michigan.
 The line ran between a stamp mill at Lac La Belle and two copper mines, the Mendota and the Delaware, from 1883 to 1888, when poor economic conditions forced the line's closure.
 The defunct company and its tracks were later purchased by the Copper Range Company, which converted the line to standard gauge and changed the railroad's name to the Keweenaw Central.
 This company failed in 1917, and the former Lac La Belle and Calumet tracks were removed in 1918.
Temple Jacob is a small historic synagogue in Michigan's Upper Peninsula.
 It owes its origins to the copper boom in the Keweenaw Peninsula in the late 19th and early 20th century.
 The first Jewish synagogue in the Copper Country, it is also the oldest, continuously active Jewish House of Worship in the Upper Peninsula and the only active synagogue in Michigan listed on the National Historic Register as part of the East Hancock Neighborhood Historic District.
 The synagogue, which is located near the north end of the lift bridge which connects the two towns of Houghton and Hancock, celebrates its Centennial anniversary in August, 2012.
 It was built on land purchased from the Quincy Mining Company and was dedicated in September 1912.
 The cornerstone inscribes the building in memory of Jacob, son of Israel Gartner, who was a generous contributor and fundraiser.
 He died shortly before the building was completed.
The Portage Lake Lift Bridge (officially the Houghton–Hancock Bridge) connects the cities of Hancock and Houghton, in the US state of Michigan, across Portage Lake, a portion of the waterway which cuts across the Keweenaw Peninsula with a canal linking the final several miles to Lake Superior to the northwest.
 US Highway 41 (US 41) and M-26 are both routed across the bridge.
 It is the only land-based link between the north (so-called Copper Island) and south sections of the Keweenaw peninsula.
Brockway Mountain Drive is an 8.883 mi scenic roadway just west of Copper Harbor in the Upper Peninsula of Michigan in the United States.
 Drivers can access the road from state highway M-26 on either end near Eagle Harbor to the west or Copper Harbor to the east in the Keweenaw Peninsula.
 The drive runs along the ridge of Brockway Mountain on the Keweenaw Fault and climbs to 1320 ft above sea level, 720 ft above the surface of Lake Superior.
 Several viewpoints along the route allow for panoramas of Copper Harbor, Lake Superior, and undeveloped woodland.
 On a clear day, Isle Royale is visible approximately 50 mi in distance from the top of the mountain.

Question: What is the address of the courthouse in the county seed of the largest city in Copper Country on the Keweenaw Peninsula?
Answer: 401 E. Houghton Street