The National Mississippi River Museum & Aquarium, operated by The Dubuque County Historical Society, exists to explore, collect, preserve, and interpret, for present and future generations, the material culture and history of Dubuque County, the Mississippi River, and the rivers of America. The artifact collection is comprehensive in its scope from prehistoric geological specimens to objects of culture from the region’s First Peoples to today. From a dime-sized mussel shell button to the 270-foot long dredge boat William M. Black, the collection holds many stories of the region and rivers.

You can engage with our collections in a variety of ways. 

Explore objects virtually through the online collection, come see exhibits in person, or read our collection spotlights, to see how the collection can support your curiosity.

Explore our timeline

By the Numbers

26,000
 - Number of objects at The Dubuque County Historical Society which changes often through new donations and deaccessions of material.

2,898
 - Number of objects in the Richard Herrmann Collection. Donated in 1964, a founding businessman of Dubuque, Herrmann operated a museum from 1871-1956. Many of the natural history objects once on display, such as fossilized fish and mammoth teeth, are now part of the DCHS collection. Along with these objects related to natural history are materials of the European-settler experience such as journals and family photo albums. He also collected objects of Indigenous culture west of the Mississippi River. DCHS acknowledges the potentially harmful impacts of housing cultural objects. Since the 1970s, the organization has worked to identify, remove, and return those objects of significance to their home communities. For more on our commitment to equitable practices please see our About page

212 - 
Number of objects in the Dubuque Boat and Boiler Works Collection. The museum is located on the site of the Iowa Iron Works/Dubuque Boat and Boiler Works business which built boats from 1870-1972. Items in this collection include blueprints, contracts, correspondence, and more.


86 - 
Number of objects in the Betty Bryant Collection. A member of the National Rivers Hall of Fame, Betty Bryant began her showboat career as a child in the 1920s. The Bryant family performed and traveled through the Ohio River and its tributaries for over 20 years. Her collection includes memorabilia from riverboat theater productions as well as daily family objects and music sheets.

4,400 - 
The number of linear feet of archival material in the collection that includes lithographs, glass plate negatives, photographs, political ephemera, and more.

Archive boxes

Donate an Object

Since the 1950s, the collection of the Dubuque County Historical Society has grown through the generous object donations of individuals, families, and businesses. We welcome object donation submissions but are unable to provide immediate response. Please anticipate a delay due to staffing availability. Acceptance of some artifacts may be limited based on current project work in storage and exceed a six month wait period. 

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Library

Research Requests

The Captain William D. Bowell, Jr. River Library & Archives, located on the second floor of the National River Center at the River Museum, is open for in-person research requests by appointment. Due to staff scheduling, availability of times may not be consistent.

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DCHS is dedicated to the history, heritage, and culture of Dubuque County and is committed to ensuring equitable advancement of knowledge and serving public audiences by sharing successful operational strategies. 

Collection Spotlight

Browse through collection items in these selected highlights. Each month a new object is presented by a member of the curatorial department for special focus. These objects are usually tied to recent object discoveries, research finds, or upcoming holidays and celebrations.

Stylemys Nebrascensis

Fossilized Shell of Stylemys Nebrascensis

This may look like a modern sun-bleached turtle shell, but it's actually the fossilized shell of Stylemys nebrascensis, an ancient tortoise from around 30 million years ago, during the Oligocene Epoch. The species name means “pillar turtle of…

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Instructional sign from the Humke Sanitary Bakery of Dubuque

Instructional Sign from a Dubuque Bakery

This is an instructional sign from the Humke Sanitary Bakery of Dubuque, dating back to the 1930s.Frederick Oliver “Ollie” Humke (1887 – 1971) began his career in the bakery business at Frank Albert Wither’s bakery on 13th and Main Street in Dubuque…

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Wedding Dress of Hedwig Hildegarde Reu Salzmann

Wedding Dress of Hedwig Hildegarde Reu Salzmann

This is the 1914 wedding dress of Hedwig Hildegarde Reu Salzmann (1893–1994), worn when she married Samuel Fredrick Salzmann (1888–1983). Her mother, Wilhelmine Marie, a Swedish immigrant, met and married her father, German immigrant Johann Michael…

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Crinoid Fossil

Crinoid Fossil

Encrinite is a type of limestone; this piece is dated to over 500 million years ago and contains fossils of crinoids. Crinoids are a type of echinoderm, related to starfish and sea urchins. Although crinoids belong to the animal kingdom, they are…

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flood painting

Rockdale Flood Painting by J.J. Kavanaugh

On the morning of July 5, 1876, the residents of Dubuque awoke to terrible news. The dam at Rockdale had failed due to torrential rain and flooded the community in the curve of Catfish Creek. Ultimately, thirty-nine individuals in the village lost…

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Harriet Hutchinson Horton Portraits

Harriet Hutchinson Horton

Last month, we introduced the Cooper family pocket watches from our permanent collection. Today, we would like to share portraits of the same family from around 1900. Those depicted are A.A. Cooper Sr., Mary Josephine Cooper, their son A.A. Cooper…

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