6 May 2025 The Future is the Product of the Past

Analyses of a 2,900-year-old iron chisel from Portugal revealed surprisingly high-quality steel

Steel tools were believed to have only become widespread in Europe during the Roman Empire, but a recent study shows that steel tools were already in use in Europe around 2,900 years ago, during the  Final Bronze Age.

The study, conducted by researchers from the University of Freiburg, sheds new light on the early history of steel production in Europe. A study by an international and interdisciplinary team headed by Freiburg archaeologist Dr. Ralph Araque Gonzalez from the Faculty of Humanities has proven that steel tools were already in use in Europe around 2900 years ago.

Using geochemical analyses, the researchers were able to prove that stone stelae on the Iberian peninsula that date back to the Final Bronze Age feature complex engravings that could only have been done using tempered steel.

Ancient Iberian stelae, upright monuments typically inscribed with information in the form of text, images, or a combination of the two, were found to be made of silicated quartz sandstone after the researchers conducted geochemical analyses.

Photos: Rafael Ferreiro Mählmann (A), Bastian Asmus (B), Ralph Araque Gonzalez (C-E)
Photos: Rafael Ferreiro Mählmann (A), Bastian Asmus (B), Ralph Araque Gonzalez (C-E)

“Just like quartzite, this is an extremely hard rock that cannot be worked with bronze or stone tools, but only with tempered steel,” said Araque Gonzalez.

The researchers examined an iron chisel from the Final Bronze Age that was also discovered in Rocha do Vigio, Portugal, to confirm their suspicion that these monuments were etched with steel tools. To work with the tough silicated quartz sandstone, they learned that the chisel was made of heterogeneous but remarkably carbon-rich steel.

 The result was also confirmed experimentally by undertaking trials with chisels made of various materials: only the chisel made of tempered steel was suitably capable of engraving the stone.

One of the stelae analyzed by the researchers has a human figure as the central motif. Strangely, the depicted face shows a happy expression when illuminated from above (left) and an unhappy expression when the light comes from below (right). Credit: Albert-Ludwigs-Universität Freiburg.

Until recently it was assumed that it was not possible to produce suitable quality steel in the Early Iron Age and certainly not in the Final Bronze Age, and that it only came to be widespread in Europe under the Roman Empire. “The chisel from Rocha do Vigio and the context where it was found show that iron metallurgy including the production and tempering of steel were probably indigenous developments of decentralized small communities in Iberia, and not due to the influence of later colonization processes.

This also has consequences for the archaeological assessment of iron metallurgy and quartzite sculptures in other regions of the world,” explains Araque Gonzalez.

The study ‘Stone-working and the earliest steel in Iberia: Scientific analyses and experimental replications of final bronze age stelae and tools’ has been published in the Journal of Archaeological Science.

DOI: 10.1016/j.jas.2023.105742

Related Articles

3600 years old Unique ancient drinking bowls on display at Boğazkale Museum

15 August 2021

15 August 2021

The 3,600-year-old fist-shaped drinking bowls found in excavations in Hattusa, the capital of the Hittite Civilization, which shaped the Anatolian...

Archaeologists Uncovered a Terracotta Commander and Warriors at the Mausoleum of China’s First Emperor

12 January 2025

12 January 2025

Archaeologists have unearthed a rare 2,000-year-old statue depicting a high-ranking military commander at the famous Terracotta Army site in China:...

1,800-Year-Old Gold Ring with ‘Venus the Victorious’ Carving and Carolingian Coins Discovered in France

25 December 2024

25 December 2024

Archaeologists from the French National Institute for Preventive Archaeological Research (INRAP) have discovered a 1,800-year-old gold ring with a chiseled...

Perre Ancient City Set to Revive Its 1,800-Year-Old Grape Mill

26 January 2025

26 January 2025

In Perre, one of the five major cities of the Kingdom of Commagene, ancient production methods will meet today’s technology....

A new finding in Persepolis reveals a Royal wall

23 October 2023

23 October 2023

A new find at Persepolis, whose magnificent ruins rest at the foot of Kuh-e Rahmat (Mount of Mercy) in southwestern...

A new study shows that the cave paintings at Cueva Ardales are the work of Neanderthals

21 August 2021

21 August 2021

A study of pigments used in murals in the Cueva Ardales caves in southern Spain has revealed that Neanderthals, long...

1800 Years Old Roman Milestone Used as Seat at Turkish Mosque

7 November 2024

7 November 2024

A milestone from the Roman Emperor Gordianus III period, which dates to 239 AD, was discovered in the Fatsa district...

4,000-year-old War Memorial of Banat-Bazi in Syria

28 May 2021

28 May 2021

Archaeologists have identified a memorial monument built before 2300 BC in the Banat-Bazi region in Syria. Known as the “White...

Archaeological Finding Traces Chinese Tea Culture Back To 400 BC

7 February 2022

7 February 2022

An archaeological team from Shandong University, east China’s Shandong Province, has found the earliest known tea remains in the world...

1,800-year-old wooden mask likely used in farm festivals found in Japan

25 April 2023

25 April 2023

Archaeologists have unearthed an almost perfectly preserved wooden mask from the early third century at the Nishi-Iwata ruins in Osaka...

Inscriptions That Could Change the History of Turkish Migration to Anatolia Are Disappearing: Esatlı Kaya Inscriptions

30 March 2025

30 March 2025

Researchers made a significant discovery during field research conducted in 1994 in Esatlı village, Mesudiye, Ordu. They introduced a series...

Maya Archaeological site for sale on Facebook has stirred controversy in Yucatán and across Mexico

31 March 2023

31 March 2023

Over 249 hectares of land for sale on Facebook Marketplace has sparked controversy in Yucatan and across Mexico. The property,...

A Medieval ‘Vampire’ Grave Found in Croatia

1 February 2025

1 February 2025

Research at the Rašaška (or Račeša) site, located in the eastern part of Croatia, revealed a grave with an unusual...

Excavation of the Temple of Athena Began in the Ancient City of Aigai

15 October 2021

15 October 2021

The foundations of the Temple of Athena were unearthed during the ongoing excavations in the ancient city of Aigai, located...

Archaeologists discover complete armored 14th-century gauntlet in Switzerland

18 January 2024

18 January 2024

Excavations in Kyburg in the canton of Zürich, northeastern Switzerland have discovered a 14th-century fully preserved gauntlet of armor in...