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The Garland House is a historic building located in Dubuque, Iowa, United States. Joseph C. Garland settled in Dubuque in 1889 and built a general insurance agency that grew to cover 25 counties in Iowa representing the Northwestern Mutual Life Insurance Company. He was also a community booster and philanthropist. The exterior of his large Georgian Revival home is covered with concrete block veneer, which is an unusual combination. The main facade is dominated by a two-story pedimented portico, the east elevation by a centered semicircular vault dormer, and the rear elevation by a two-story veranda. The house is capped with a hip roof with dormers. It was individually listed on the National Register of Historic Places in 1983, and it was included as a contributing property in the Langworthy Historic District in 2004.

Langworthy 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 2004. At the time of its nomination it consisted of 110 resources, which included 94 contributing buildings, five contributing structures, nine non-contributing buildings, and two non-contributing structures. This residential area was developed from the end of the American Civil War to the beginning of World War I. Most of the houses were built between 1890 and 1910, with four large houses pre-dating the Civil War. For the most part, the houses here are larger in scale and include examples of Victorian and the various revival and American Movement styles from the late 19th and 20th centuries. The district is completely residential with no commercial or institutional buildings, and with only one multi-family house, a duplex. Two houses were individually listed on the National Register: Langworthy House, an Octagon house from 1855, and the Garland House (1907). The district derives its name from the Langworthy family who were early settlers in Dubuque and played a prominent role in the development of the local lead mining industry and the city itself. Three of the brothers built houses here.

The Langworthy House, also known as the Octagon House, is a historic building located in Dubuque, Iowa, United States. Built in 1856, it was designed by local architect John F. Rague for local politician Edward Langworthy. The two-story brick home features tall windows, a columned entry, and a windowed cupola. Langworthy and three of his brothers were among the first settlers in Dubuque. They were partners in a lead mine, helped to build the territorial road between Dubuque and Iowa City, they farmed, invested in real estate, and they owned a steamboat and a mercantile exchange. The house has been passed down through Langworthy's descendants. It was individually listed on the National Register of Historic Places in 1975, and it was included as a contributing property in the Langworthy Historic District in 2004.

The Fenelon Place Residential 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 2015. At the time of its nomination it consisted of 218 resources, which included 171 contributing buildings, two contributing structures, one contributing site, 43 non-contributing buildings, and one non-contributing structure. The residential area that makes up the district is located on a plateau located directly above the Mississippi River Valley. This was the first bluff-top neighborhood in Dubuque that established elevator service. The first Fenelon Place Elevator, listed on the National Register in 1978, was completed in 1894. Early houses on the plateau were small cottages built by lead miners. They were replaced by large houses that were built in two periods. The first period at the end of the 19th century saw houses built in the Italianate, Gothic Revival, Second Empire, and Queen Anne styles. House in the second period in the beginning of the 20th century were largely built in the Classical Revival and Tudor Revival styles.

The Fenelon Place Elevator (also known as the Fourth Street Elevator) is a 3 ft (914 mm) narrow gauge funicular railway located in Dubuque, Iowa, United States. It was listed in the National Register of Historic Places in 1978. It was included as a contributing property in the Cathedral Historic District in 1985, and in the Fenelon Place Residential Historic District in 2015.

St. Pius X Seminary is associated with Loras College, Dubuque, Iowa, and run under the auspices of the Archdiocese of Dubuque. The seminary prepares Minor (College) Seminarians for the priesthood, specifically preparing candidates for entrance into Major Seminary & Theological studies. Through Loras, the seminary provides full training in Philosophical studies, while giving students the necessary religious studies courses required for entrance into Major Seminary. Founded in 1839 by Bishop Mathias Loras as St. Raphael Seminary, the seminary has operated under various names and conditions at Loras College until adopting its present name in 1954. St. Pius X has prepared countless Seminarians across Iowa & surrounding states for the priesthood, counting over 30 Bishops as alumni. Currently, the seminary is housed at the Vianney House and serves Seminarians of the Archdiocese of Dubuque and the Diocese of Des Moines. The current rector of St. Pius X Seminary is Fr. David Schatz and the spiritual director is Fr. Tom McDermott.

St. Raphael's Cathedral is a Catholic cathedral and a parish church in the Archdiocese of Dubuque located in Dubuque, Iowa. The parish is the oldest congregation of any Christian denomination in the state of Iowa. The cathedral church, rectory, former convent, and former parochial school building are contributing properties in the Cathedral Historic District on the National Register of Historic Places.

The Metropolitan Archdiocese of Dubuque (Latin: Archidiœcesis Metropolitae Dubuquensis) is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in the northeastern quarter of the state of Iowa in the United States. It includes all the Iowa counties north of Polk, Jasper, Poweshiek, Iowa, Johnson, Cedar, and Clinton counties, and east of Kossuth, Humboldt, Webster and Boone counties. The archdiocese has an area of about 17,400 square miles (45,000 km2). The Archdiocese of Dubuque is a metropolitan archdiocese. There are three suffragan dioceses in the ecclesiastical province under Dubuque's metropolitan archbishop: the Dioceses of Davenport, Des Moines, and Sioux City.

Cathedral 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 1985. At the time of its nomination it consisted of 124 resources, which included 96 contributing buildings, one contributing site, one contributing structure and 26 non-contributing buildings. The district was the first residential area in Dubuque, and developed into a tightly knit neighborhood. It is located west of the original commercial district and below the bluffs of the Mississippi River that rise steeply to the west. Although its original structures no longer stand, its historic buildings are largely from the mid to late 19th century. St. Raphael's Cathedral complex, from which the district receives its name, was important in serving immigrants, including most of the Irish immigrants to the city, and in building ties. In 1985, the district was deemed to have retained "most of its original character and fabric" from the late 1800s. Washington Park (contributing site), J.H. Thedinga House (1855), Fenelon Place Elevator (1882; contributing structure), and Redstone (1888) are all individually listed on the National Register.

The United States Post Office and Courthouse, Dubuque, Iowa is a courthouse of the United States District Court for the Northern District of Iowa located in Dubuque, Iowa. Completed in 1934, it was listed in the National Register of Historic Places in 1985. It is a contributing resource within the Cathedral Historic District.

The Johann Christian Frederick Rath House is a historic building located in Dubuque, Iowa, United States. Rath settled in the Dubuque are from his native Hanover in 1851. He was a wood worker, farmer and lead miner. He acquired property along what is now Mt. Loretta Avenue and gave parcels to his children as they came of age. Rath completed this house in 1853. He died in 1881 and the house remained in the family until 1937. The house is a 1½-story brick structure with a walk-out basement. The side-gable roof has a large dormer on the back that was created from two smaller dormers in 1940. Also on the rear of the house is a full-length, two-story porch. The house's general form, window shapes, chimney placement and its five-bay, symmetrical plan suggests the Georgian Revival style. It was listed on the National Register of Historic Places in 1977.

The J.H. Thedinga House is a historic building located in Dubuque, Iowa, United States. Thedinga was a native of Hanover who settled in Dubuque in 1839. He studied law, but never practiced it. He was an early settler here and was engaged in retail. Thedinga also held a variety of political positions, including mayor. The two-story brick structure features crow-stepped gables on the sides. It was built as an addition to a frame house in 1855. The frame structure was removed some time between 1885 and 1900. The brick structure was altered at that time so that the library was converted into a kitchen and dining room, the parlor was divided into two sections, and the lower and upper porches were added to the south side. The house was individually listed on the National Register of Historic Places in 1976, and it was included as a contributing property in the Cathedral Historic District in 1985.