Dubuque County Courthouse

The Dubuque County Jail is a historic building at 36 East 8th Street in Dubuque, Iowa, United States. Completed in 1858, the jail is an example of the uncommon Egyptian Revival style. It is architecturally a highly original work of John F. Rague, who also designed the 1837 Old Capitol of Illinois and the 1840 Territorial Capitol of Iowa. The building was designated a National Historic Landmark for its architecture in 1987. It served as a jail for more than a century, became a museum in 1975, and was converted into county offices in 2016.

The Grand Opera House is an opera house located at the corner of 8th and Iowa Streets in Dubuque, Iowa that was built in 1890. It was listed on the National Register of Historic Places in 2002.It was deemed important as a "national treasure". The theatre has the largest of all stages ever in Dubuque, and is Dubuque's only surviving opera house. It is architecturally important as an early Richardsonian Romanesque building in Dubuque and as a salient work of Chicago architect Willoughby James Edbrooke. It is Edbrooke's only surviving opera house, and he used its design in his design portfolio that won him the position of Supervising Architect of the U.S. Treasury Department in 1891. Its design is said to be "representative of Edbrooke's smooth exterior wall interpretation of the Richardsonian Romanesque style." It is also historically important from its association with high-quality theatre in Dubuque during 1890-1928. The theater has been preserved with great historic integrity and, in 2002, was being restored for continuing use in live stage entertainment. Its history is extremely well documented.In 2015 performance events at the theater marked its 125th anniversary.

The Dubuque Millworking Historic District is a nationally recognized historic district located in Dubuque, Iowa, United States. It was listed on the National Register of Historic Places in 2008. At the time of its nomination it consisted of 24 resources, which included 19 contributing buildings, and five contributing structures. Made up of large industrial buildings, the district represents the period of transition when Dubuque went from lumber production to millwork production. The buildings are associated with two local millworking firms, Carr, Ryder & Adams and Farley Loetscher. All of the buildings are brick construction, and are between two and five stories in height. Decorative features include pavilions, pilasters, large entry arches, decorative pediments and parapets. Two of the buildings fill an entire block, while three cover a half block. The most substantial buildings were built between 1881 and 1924.

The Security Building, also known as the Stampfer Building, is a historic structure in Dubuque, Iowa, United States. The cream-colored building is associated with the J. F. Stampfer Co. department store.

Dubuque YMCA Building, also known as the Iowa Inn, is a historic building located in Dubuque, Iowa, United States. Several area churches partnered to form the local YMCA in 1857. It was one of the first chapters formed west of the Mississippi River. Its activities ceased during the American Civil War, and it was reformed in 1866. They rented rooms on Main Street for their activities. Its first modest gymnasium was outfitted in 1884, and it was improved in 1992 when YMCA took over the facilities over the former Dubuque Athletic Club. The local YMCA completed the first section of this facility two years later, with the second section completed in 1916. Often the local YMCA chapters copied or adapted one another's building designs, which gave their facilities an institutional character in form and style. The Romanesque Revival style was popular in Iowa in the 19th century, which is reflected in the 1894 section. In the early 20th century they generally employed the Neoclassical and Commercial styles, and the 1916 wing reflects the Commercial style. YMCA remained here until 1969, when they opened a new joint facility with the YWCA on Dodge Street. This building became the Iowa Inn, which rented rooms to low-income people. MetroPlains Development of St. Paul, Minnesota bought the building in 2000 and renovated it into an apartment building for senior citizens known as the Henry Stout Apartments. It was named for an early supporter of YMCA in Dubuque.The building was listed on the National Register of Historic Places in 2002.

The Town Clock is a large clock that stands in downtown Dubuque, Iowa. The clock has stood over the city for over 140 years. The present clock is the second "Town Clock"; the first collapsed in the 1870s, killing three people. The building on which it originally stood is listed on the National Register of Historic Places, but the clock tower itself is not.

Five Flags Center is a multi-purpose facility in downtown Dubuque, Iowa. It is named for the five flags that have flown over Dubuque; the Fleur de Lis of France (1673–1763), the Royal Flag of Spain (1763–1803), the Union Jack of Great Britain (1780, during a brief interruption of Spanish rule), the French Republic Flag of Napoleon (1803) & America's Stars and Stripes (1803–Present).

Upper Main Street Historic District is a nationally recognized historic district located in Dubuque, Iowa, United States. It was listed on the National Register of Historic Places in 2005. At the time of its nomination it consisted of 24 resources, which included 18 contributing buildings, and six non-contributing buildings. In 2011 the boundaries of the district were expanded to include four additional buildings on the west side of the 900 block of Main Street. The district is the northern end of the city's most important commercial street. It is situated on a level terrace above the downtown area, located to the east. The buildings located on the east side of Main Street have exposed foundations along the alley because the grade descends in that direction. For the most part the district is made up of commercial buildings, although there is one house, four rowhouses, and a church. All of the buildings are masonry construction, and they are between one and four stories tall. The bell tower of St. Luke's United Methodist Church (1896) is equivalent to an eight-story building. St. Luke's Church and the Interstate Power Company Building (1894, 1956) are individually listed on the National Register.

German Bank is a historic building located in the Lower Main Street district of Dubuque, Iowa, United States. The city's German community was its most prominent ethnic group in the mid to late 19th century. Like many other Iowa cities of that era, Dubuque had banks that were owned by, and catered to, members of their particular immigrant communities. T.H. Thedinga, the city's first German-born mayor, started this bank in 1864 to serve immigrant Germans. In 1868 it moved from its original location on Main Street and into the former Dubuque Miners' Bank building. That building was torn down in 1901 in order to construct this one. It was designed by Dubuque architect John Spencer in partnership with Chicago architect W.G. Williamson. The three-story brick building has a highly decorative main facade composed of polished pink granite on the main floor and terra cotta on the upper two floors. Decorative elements include egg-and-dart, Greek fret, a row of small lions' heads, bay windows, scroll pediments, imperial German eagles, and a bracketed cornice with dentils. The second and third floors are dominated by four fluted, banded columns with Corinthian capitals. The bank remained in operation here until 1932 when it closed in the Great Depression. Since 1946 the first floor has housed a restaurant and bar. The building was individually listed on the National Register of Historic Places in 1978. and it was included as a contributing property in the Old Main Street Historic District in 1983.

The Interstate Power Company Building, also known as the Masonic Hall and the Dubuque Electric Company, is a historic building located in Dubuque, Iowa, United States. While a single facility, this is actually two buildings: an 1894 three-story Queen Anne, and a 1956 three-story (later four-story) Modern Movement free-standing addition. The Dubuque Electric Company moved into the older building in 1924, and the following year it was reorganized as Interstate Power Company. This became the headquarters of a regional electrical utility that, at one time, served parts of eight states and a Canadian province. The Great Depression and antitrust court rulings altered the company's fortunes. The 1956 addition was designed to hold the companies large computers in an air-conditioned environment, in addition to office space. Other additions to the building were made in 1962, 1981 and 1989. The facility remained Interstate's corporate headquarters until Alliant Energy bought and absorbed the company in 1996. Alliant continued to use the building for a period of time afterward. It was included as a contributing property in the Upper Main Street Historic District in 2005, and it was individually listed on the National Register of Historic Places in 2008.

The Dubuque Museum of Art is an art museum in Dubuque, Iowa. The museum is known for its collection of works by Grant Wood. The collections include more than 2,500 works of art housed in the former Statesman Bank building in downtown Dubuque. The museum was founded in 1987, although it evolved out of the Dubuque Art Association which had been operating sporadically since 1874.

Washington Park (also known as Washington Square) is a small public, urban park (1 acre) located in Downtown Dubuque, Iowa, United States. The park encompasses an entire city block, bordered on the north by West 7th Street, on the west by Bluff Street, on the south by West 6th Street, and on the east by Locust Street. The park is located between the city's post office and the Dubuque Museum of Art. It was individually listed on the National Register of Historic Places in 1977, and it was included as a contributing property in the Cathedral Historic District in 1985.