28 August 2025 The Future is the Product of the Past

Oldest US firearm unearthed in Arizona, a 500-year-old bronze cannon linked to Coronado expedition

Independent researchers in Arizona have unearthed a bronze cannon linked to the 16th-century expedition of Francisco Vázquez de Coronado, and it is marked to be the oldest known firearm found in the continental United States.

The 42-inch-long, roughly 40-pound sand-cast bronze cannon was discovered at the location of a Spanish stone-and-adobe structure in the Santa Cruz Valley that is thought to have been a part of the short-lived settlement San Geronimo III.

To finance an expedition to North America in 1539, Vázquez de Coronado took out large loans and mortgaged his wife’s possessions. The Spanish conquistador and his 350 soldiers intended to locate the legendary (and nonexistent) Seven Cities of Gold north of Mexico. By 1541, they had reached southern Arizona, where they established a settlement they called San Geronimo III, or Suya. San Geronimo was the first European town in the American Southwest.

 Rather than accumulating immense wealth, Coronado and his men plied, and spent the next three years plundering, enslaving, and murdering their way across the region. These transgressions did not go unanswered. In the predawn hours of one fateful morning in 1541, the native Sobaipuri launched a surprise attack on the town. Many settlers were killed in their beds, and the survivors fled in disarray. The cannon — meant to intimidate and protect — was never even loaded.

Although Coronado was bankrupt and facing war crime charges when his expedition came to an end in Mexico City, his impact on North America would last for many generations.

The wall gun was resting on the floor of a Spanish structure. Credit: International Journal of Historical Archeology

One site in particular has produced a large number of artifacts associated with the explorers, according to the authors of a study published on November 21st in the International Journal of Historical Archeology. Researchers found European pottery, weapon parts, including a 42-inch-long bronze cannon, and glass and olive jar fragments in the ruins of a stone and adobe building in Arizona’s Santa Cruz Valley.

“Not only is it the first gun ever recovered from the Coronado expedition, but consultation with experts throughout the continent and in Europe reveal that it is also the oldest firearm ever found inside the continental USA,” Archaeologist Deni Seymour explained.

The early firearm also called a wall gun, was typically used as a defensive weapon positioned on a wooden tripod on fortification walls and required two operators. However, in Coronado’s case, such a cannon would have been used offensively, typically to pierce the weaker walls of buildings in Indigenous communities.

Archaeologists were able to date the cannon to Coronado’s time using radiocarbon dating and optically stimulated luminescence techniques, and the other artifacts matched descriptions of the supplies and possessions of his expedition. However, the wall gun’s simple casting suggests that, in contrast to more elaborate Spanish cannons, it might have been built in Mexico or the Caribbean—and possibly even acquired from Ponce de León’s previous expedition.

Seymour, D., Mapoles, W.P. Coronado’s Cannon: A 1539-42 Coronado Expedition Cannon Discovered in Arizona. Int J Histor Archaeol (2024). https://doi.org/10.1007/s10761-024-00761-7

Cover Image Credit: A bronze medieval-style wall or rampart gun, believed to have been part of the Francisco Vázquez de Coronado expedition found in southern Arizona. Credit: Deni J. Seymour

Related Articles

Venice of the Pacific: The mysterious Micronesian ruins of Nan Madol

12 July 2022

12 July 2022

Sometimes art and architecture challenge our perceptions of what was formerly thought to be feasible and what our forefathers were...

In Jerusalem, a 2700-year-old private toilet from the First Temple era was unearthed

5 October 2021

5 October 2021

The Israel Antiquities Authority discovered a private toilet from the First Temple Period on the Armon Hanatziv promenade in Jerusalem,...

From ‘Empty Lands’ to Rich History: Discovery of the First Bronze Age Settlement in Maghreb, Dating to 2,000 BC

15 March 2025

15 March 2025

Researchers at the University of Barcelona have made a remarkable discovery: the first Bronze Age settlement in the Maghreb region...

A Scandinavian Roman gladiator in York: Research Reveals Unknown Migrations Before the Viking Age

7 January 2025

7 January 2025

Scandinavian genes were present on the British Isles several centuries earlier than previously thought, including evidence from a man buried...

The oldest evidence of human use of tobacco was discovered in Utah

11 October 2021

11 October 2021

According to recent research, burnt seeds discovered in the Utah desert suggest that humans used tobacco initially and that some...

In Fraueninsel in Lake Chiemsee: Romanesque a central building hidden underground for 1,000 years discovered

25 February 2024

25 February 2024

On Fraueninsel, an island in Germany’s Lake Chiemsee, archaeologists discovered a cult site that may have been slumbering underground for...

Carvings at Göbeklitepe could be World’s Oldest Calendar

6 August 2024

6 August 2024

Experts suggest that markings on a stone pillar at the 12,000-year-old Göbeklitepe archaeological site in Türkiye probably represent the oldest...

Military Team Discovers Remarkable 2,000-Year-Old Celtic Artifacts, Including Chariot Parts and Bridle-Bit

4 February 2025

4 February 2025

Military personnel and veterans at RAF Valley in Anglesey on the island of Anglesey, Wales, have uncovered sensational Iron Age...

An ancient Roman road has been discovered in the Venice Lagoon

24 July 2021

24 July 2021

Researchers discovered a Roman road submerged in the Venice Lagoon. The finding suggests that substantial communities may have existed in...

Trier University’s Digital Coin Cabinet is Now Accessible

19 February 2024

19 February 2024

Historical coins are much more than just pieces of jewelry for collections and exhibitions and are of particular interest for...

Archaeologists may have Found a Viking Age Marketplace in Norway

21 February 2024

21 February 2024

Archaeologists from the University of Stavanger have identified the possible remains of a marketplace from the Viking Age on a...

The Largest Medieval Coins Treasure found in Recent Decades discovered in Germany

16 August 2024

16 August 2024

Archaeologists have unearthed one of the largest medieval coin hoards, consisting of approximately 1,600 coins, in recent years in the...

Archaeologists in the Tangier Peninsula Discovered Three Ancient Cemeteries, Including a Stone Burial Dating to Around 4,000 Years Ago

17 May 2025

17 May 2025

A significant archaeological discovery in northern Morocco’s Tangier Peninsula, situated just south of the Strait of Gibraltar, has led to...

World’s Largest Geoglyphs Found in the Thar Desert

29 May 2021

29 May 2021

A massive spiral encompassing 100,000 square meters unearthed in the Indian desert may be the greatest drawing ever drawn. The...

A coin of Queen Fastrada and Charlemagne found – First of its kind

8 May 2023

8 May 2023

A coin purchased by the Charlemagne Center in Aachen, Germany, bears the name of Queen Fastrada. This is the first...