Territorial Evolution of Colorado - 2018

 Territorial Evolution of Colorado

A Primary Source Exhibit

Welcome to the Territorial Evolution of Colorado, a primary-source exhibit curated by the Klos-Yavneh Family of Colorado/New Mexico and designed for display in public libraries, educational institutions, and civic venues.

This exhibit traces the complex legal, political, and imperial transformations of the lands that became the State of Colorado, using original government printings, treaties, laws, land grants, and signed documents spanning more than two centuries.



Overview: How Colorado Came to Be

The Territory of Colorado was formally organized by Congress on February 28, 1861, with boundaries identical to the modern state. Its path to statehood, however, was shaped by earlier imperial rivalries, international treaties, westward expansion, war, and population growth.

Key milestones include:

·      Territorial Formation: 1861–1876

·      Statehood: August 1, 1876 (38th state; “The Centennial State”)

·      Constituent Territories: Kansas, Nebraska, New Mexico, and Utah

·      Major Population Catalyst: Pike’s Peak Gold Rush (1858)


Imperial and International Foundations

The lands comprising present-day Colorado entered United States sovereignty through a sequence of international agreements and territorial realignments:

·      Louisiana Purchase (1803): Acquired lands east of the Continental Divide

·      Adams–Onís Treaty (1821): Transferred portions of Colorado to Spain

·      Mexican Independence (1821): Spanish lands passed to Mexico

·      Texas Annexation (1845): Reclaimed former Spanish-ceded lands

·      Treaty of Guadalupe Hidalgo (1848): Ended the Mexican–American War and secured all remaining Colorado lands for the United States

These treaties, displayed here in original congressional and executive printings, define the legal architecture of Colorado’s territorial evolution.


Spanish, French, and Mexican Rule


Before U.S. sovereignty, Colorado was governed successively by three European empires and one emerging republic:

·      France: Claimed the region as part of La Louisiane following La Salle’s Mississippi expedition (1682)

·      Spain: Governed Colorado as part of Santa Fé de Nuevo México (1763–1800)

·      France (briefly): Regained Louisiana under Napoleon (1800)

·      Mexico: Controlled lands south of the Arkansas River following independence (1821–1848)

The exhibit includes signed documents from three monarchs who ruled Colorado lands:

·      Louis XIV of France

·      Charles IV of Spain Abdication

·      Ferdinand VII of Spain and Mexico


American Territorial Development

Gold, Railroads, and Governance

·      1858: Pike’s Peak Gold Rush brings sustained U.S. settlement

·      1861: Colorado Territory created during the secession crisis

·      1866-1867: Statehood bills vetoed twice by President Andrew Johnson

·      1870: Completion of the Denver Pacific Railroad establishes Denver as a regional hub

·      1876: President Ulysses S. Grant admits Colorado to the Union

Johnson’s vetoes—on display here—reveal Reconstruction-era concerns over taxation, representation, and Black suffrage requirements under the Edmunds Amendment.


Highlights of the Exhibit

Original materials on display include:

·      1803 Louisiana Purchase – dual-language congressional printing

·      1810 PIKE, Zebulon Montgomery - An Account of Expeditions to the Sources of the Mississippi … interior parts of New Spain ... with all Maps, Philadelphia: Printed by John Binns, published by C. & A. Conrad, & Co. of Philadelphia, , 1810

·      1821 Adams–Onís Treaty - first official U.S. edition

·      Mexican Independence Decrees (1822)

·      1823 James Monroe Land Grant, signed by the President

·      1845 Texas Annexation Message

·      1848 Treaty of Guadalupe Hidalgo (Senate executive printing)

·      1862 Laws of the Colorado Territory

·      1862 Colorado Quit-Claim Deed (Arapahoe County)

·      1863 First Colorado Cavalry court-martial death sentence

·      1865 Colorado Constitution printing

·      1867 Colorado Statehood Veto Message

Each item illustrates how law, land, and governance shaped Colorado’s emergence from imperial frontier to U.S. state.


2018-19 Exhibition Locations:

Old Colorado City Library
2418 West Pikes Peak Ave.,
Colorado Springs, CO 80904 
📞 (719) 531-6333, x7006


Penrose Library
20 N. Cascade Avenue
Colorado Springs, CO 80903
📞 (719) 531-6333





Provenance and Loans

Exhibited documents are on loan from: Eilleen E. Klos; Louis & Jenna Klos; Nicholas & Megan Klos; Zachary A. Klos; and Raphael Yavneh Shattenkirk (Colorado); Stanley and Naomi Yavneh Klos (New Mexico)


Why This Exhibit Matters

This exhibit demonstrates, through primary sources, not summaries. that Colorado’s history is inseparable from global diplomacy, imperial ambition, Reconstruction politics, and constitutional law. It is not folklore. It is documented governance.

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