Image Credits
Every historical photograph or artwork on Trade Triad is verified public-domain or equivalently open, and credited here. Decorative maps, route-line motifs, and icons elsewhere on the site are original illustrations created for Trade Triad, not reproductions of any copyrighted map.
| Used on | Description | Source | License |
|---|---|---|---|
| Air Freight and High-Speed Global Trade | A U.S. Air Force C-54 Skymaster cargo plane comes in to land at Tempelhof airport during the 1948-49 Berlin Airlift, an early example of large-scale air freight. Author: Henry Ries · 1948 |
Wikimedia Commons (via Library of Congress) | Public domain (U.S. federal government work; U.S. Air Force photograph) |
| Atlantic Trade and the Human Cost of Enslavement | A 1787 printed diagram of the slave ship Brookes, created to document the inhumane crowding of enslaved people and widely used in the campaign to abolish the Atlantic slave trade. Author: James Phillips (printer, London) · 1787 |
Wikimedia Commons (British Library) | Public domain (published 1787; copyright term expired) |
| Banking and Credit in Early Commerce | Quinten Massys's 1514 painting of a moneylender and his wife weighing coins and keeping ledgers, reflecting the rise of banking and credit in early European commerce. Author: Quinten Massys · 1514 |
Wikimedia Commons (Musée du Louvre) | Public domain (artist died 1530; copyright term expired) |
| Container Shipping and the Modern Supply Chain | Shipping containers cover the docks at the Port of Newark, New Jersey, in March 1974, ready for loading onto ships as part of the rise of container shipping. Author: Dan McCoy · March 1974 |
Wikimedia Commons | Public domain (U.S. federal government work; EPA Documerica project, National Archives) |
| Cotton and the Global Trade in Raw Materials | Workers operate gin stands and bale raw cotton at a Mississippi cotton gin in this 1899 photochrom print, illustrating the processing stage of the global raw cotton trade. Author: Detroit Photographic Co. · 1899 |
Library of Congress | Public domain (published before 1928) |
| Early Trade Networks of Ancient China | This Shang dynasty bronze ritual cauldron, or ding, cast around the 12th–11th century BCE, reflects the long-distance networks that supplied ancient China's bronze foundries with metal ore. Author: Unknown · 12th–11th century BCE (Shang dynasty) |
Metropolitan Museum of Art | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| Gold, Salt, and the Empire of Mali | This detail from the 1375 Catalan Atlas shows Mansa Musa of the Mali Empire enthroned and holding a gold nugget, reflecting the empire's legendary gold wealth. Author: Attributed to Abraham Cresques · 1375 |
Wikimedia Commons | Public domain (created 1375; held by the Bibliothèque nationale de France) |
| How Early Communities Exchanged Goods Before Currency | An 1845 print shows cowry shells being weighed out as currency by an Arab trader, reflecting one of the oldest known forms of money used before coinage. Author: R. K. Thomas (artist); source: Science & Society Picture Library · Print dated 1845, depicting a practice with much older prehistoric and ancient roots |
Wikimedia Commons | Public domain (Public Domain Mark 1.0; author's copyright term expired) |
| How Historic Trade Routes Continue to Shape Modern Cities | A 1912 view of lower Manhattan's skyline and harbor, the historic commercial waterfront whose trade routes still shape New York City today. Author: Unknown (published by L. H. Nelson Co.) · 1912 |
Wikimedia Commons | Public domain (published before 1928; no known copyright restrictions) |
| Indian Ocean Trade Networks | A native Arab dhow photographed at Suez in 1894 represents the traditional sailing vessels that carried goods across the Indian Ocean and Red Sea trade networks. Author: William Henry Jackson · 1894 |
Library of Congress (via Wikimedia Commons) | Public domain (published in the United States before 1931) |
| Medieval Fairs and the Growth of Regional Markets | A 19th-century painter's reconstruction of a medieval fair on the Friday Market in Ghent, where merchants sold jewelry, cloth, and other goods. Author: Félix De Vigne · Painted 1862, depicting an imagined medieval-era fair |
Wikimedia Commons | Public domain (artist died 1862; faithful reproduction of a public domain work of art) |
| Mediterranean Commerce in the Ancient World | A Greek terracotta amphora, the standard shipping container of the ancient Mediterranean, used to transport wine, oil, and other goods by sea. Author: Unknown (Greek, Attic workshop) · Last quarter of the 6th century BCE |
The Metropolitan Museum of Art (Open Access) | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| Mercantilism and the Politics of Early Modern Trade | Ships crowd the entrance to a Dutch port in this painting by Willem van de Velde the Younger, evoking the state-regulated maritime commerce central to mercantilist policy. Author: Willem van de Velde the Younger · c. 1665 |
The Metropolitan Museum of Art (via Wikimedia Commons) | Public domain (CC0, Met Open Access) |
| Obsidian and the World's Oldest Known Trade Networks | This obsidian blade from the Cycladic Islands, dated around 2700–2200 BCE, illustrates the Stone Age trade networks that carried volcanic glass across the Aegean Sea. Author: Unknown · ca. 2700–2200 BCE (Early Cycladic II) |
Metropolitan Museum of Art | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| Phoenician Maritime Trade | This Assyrian palace relief from Dur-Sharrukin depicts a Phoenician ship ferrying cedar timber, evidence of the Phoenicians' renowned seaborne trade network. Author: Unknown ancient sculptor; photographed by Marie-Lan Nguyen · ca. 713-716 BCE (relief); photograph taken 2005 |
Wikimedia Commons | Public domain (released into the public domain by the photographer) |
| Ports and the Growth of Commercial Cities | A 1630 painting of Amsterdam's busy harbor, illustrating how maritime trade fueled the growth of major commercial port cities in early modern Europe. Author: Hendrick Cornelisz Vroom · 1630 |
Wikimedia Commons (Bavarian State Painting Collections) | Public domain (artist died 1640; copyright term expired) |
| Railroads and the Expansion of Inland Trade | Railroad officials and workers celebrate the completion of the First Transcontinental Railroad at Promontory Summit, Utah, in 1869. Author: Andrew J. Russell · May 10, 1869 |
Wikimedia Commons | Public domain (published before 1923; U.S. federal/National Archives holding) |
| Refrigeration and the Global Food Trade | An 1899 refrigerator railcar built for the Swift Refrigerator Line, part of the system that let perishable food travel long distances. Author: Unknown (Chicago Historical Society collection) · 1899 |
Wikimedia Commons | Public domain (published before 1923) |
| Roman Roads and Commercial Expansion | Giovanni Battista Piranesi's 1756 engraving captures the massive stone paving of the Appian Way, the Roman road that helped knit together the empire's trade routes. Author: Giovanni Battista Piranesi · Engraving made 1756, depicting a road built from 312 BCE |
The Metropolitan Museum of Art (Open Access) | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| Steamships and the Transformation of Maritime Commerce | The SS Great Eastern, photographed in 1857, was the largest steamship ever built up to that time and helped transform transoceanic commerce. Author: Robert Howlett · 1857 |
Wikimedia Commons | Public domain (published before 1928; CC Public Domain Mark via Museum of Fine Arts, Boston) |
| Sugar and the Plantation Economy of the Atlantic World | A 1750 map of Barbados by Thomas Jefferys documenting the island's parishes, sugar works, mills, and plantation lands during the height of the Atlantic sugar economy. Author: Thomas Jefferys · 1750 |
Wikimedia Commons | Public domain (published before 1928) |
| The Amber Road: Linking the Baltic and the Mediterranean | This 7th-century BCE Etruscan bronze fibula is inlaid with amber, a material that traveled south from the Baltic to the Mediterranean world along the ancient Amber Road. Author: Unknown · 7th century BCE (Etruscan, Late Geometric period) |
Metropolitan Museum of Art | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| The Columbian Exchange and Its Global Consequences | Diego Gutiérrez's richly illustrated 1562 map of the Americas, made soon after European contact began the exchange of crops, animals, and diseases between the Old and New Worlds. Author: Diego Gutiérrez (engraved by Hieronymus Cock) · 1562 |
Wikimedia Commons (Library of Congress, Lessing J. Rosenwald Collection) | Public domain (published 1562; copyright term expired) |
| The Development of Markets in Ancient Societies | A gold stater struck by the Lydians in the 6th century BCE, among the earliest coined money, which helped standardize exchange in ancient marketplaces. Author: Unknown (Lydian mint) · ca. 560-546 BCE |
The Metropolitan Museum of Art (Open Access) | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| The Dutch Golden Age and the Rise of Global Finance | Dutch East India Company ships (East Indiamen) at sea in a painting by Hendrick Cornelisz Vroom, reflecting the maritime trade that fueled Amsterdam's rise as a financial center. Author: Hendrick Cornelisz Vroom · c. 1600-1630 |
Rijksmuseum (via Wikimedia Commons) | Public domain (CC0, Rijksmuseum open access; also public domain due to age) |
| The Gold Standard and the Rise of International Finance | An 1808 hand-colored print shows merchants and clerks conducting business in the Great Hall of the Bank of England, the institution at the heart of 19th-century gold-standard finance. Author: Augustus Charles Pugin and Thomas Rowlandson (aquatint by John Hill) · 1808 |
The Metropolitan Museum of Art (via Wikimedia Commons) | Public domain (CC0, Met Open Access; also public domain due to age) |
| The Hanseatic League and Northern European Commerce | A map of the principal trade routes of the Hanseatic League, the medieval confederation of merchant guilds that dominated commerce across the North and Baltic Seas. Author: Flo Beck · Map created 2006, depicting trade routes of the 13th-17th centuries |
Wikimedia Commons | Public domain (released into the public domain by the creator) |
| The Historical Spice Trade | A 1592 engraved map by Petrus Plancius showing the Moluccas (Spice Islands), the source of the cloves and nutmeg that drove the early spice trade. Author: Petrus Plancius (cartographer) · 1592 (this print circa 1617) |
Wikimedia Commons | Public domain (published 1592/1617; copyright term expired) |
| The Incense Routes of Ancient Arabia | This bronze incense burner from southwestern Arabia, dated to roughly the mid-1st millennium BCE, reflects the region's wealth from the ancient frankincense and myrrh trade. Author: Unknown · ca. mid-1st millennium BCE |
Metropolitan Museum of Art | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| The Industrial Revolution and Mass Production | A 1911 photograph by Lewis Hine showing spinners at work on the floor of a cotton mill, illustrating the mechanized mass production of the industrial era. Author: Lewis Hine · 1911 |
Wikimedia Commons (Library of Congress) | Public domain (published before 1931; U.S. copyright term expired) |
| The Internet and the Transformation of Commerce | The handwritten log recording the first message sent between computers on ARPANET, the US government research network that became a forerunner of the internet. Author: Charles S. Kline · October 29, 1969 |
Wikimedia Commons | Public domain (published in the United States, 1931-1977, without a copyright notice) |
| The Manila Galleon and the Pacific Silver Trade | A 1734 map of the Philippine Islands by Jesuit cartographer Pedro Murillo Velarde, the first major scientific map of the archipelago, depicting the maritime routes linking Manila to the wider Pacific trade. Author: Pedro Murillo Velarde (with engraver Nicolás de la Cruz Bagay) · 1734 |
Library of Congress (via Wikimedia Commons) | Public domain (published before 1928) |
| The Maritime Routes of Southeast Asia | A Dutch engraving from the 1590s depicting traditional Javanese vessels, including a jong, encountered at the port of Bantam during early European voyages to Southeast Asia. Author: Unknown (anonymous printmaker, Northern Netherlands) · Depicts 1596; print made circa 1597-1598/1646 |
Wikimedia Commons (Rijksmuseum Amsterdam) | CC0 1.0 Universal (Rijksmuseum public domain dedication) |
| The Mongol Peace and the Revival of the Silk Road | This 1280 painting by the Yuan court painter Liu Guandao depicts Kublai Khan on a hunting expedition during the era of the Pax Mongolica that revived Silk Road trade. Author: Liu Guandao · 1280 (Yuan dynasty) |
Wikimedia Commons | Public domain (painted 1280; artist long deceased) |
| The Rise of Chartered Trading Companies | A 1665 painting of the Dutch East India Company (VOC) trading lodge at Hooghly in Bengal, one of the fortified trading posts chartered companies built across Asia. Author: Hendrik van Schuylenburgh · 1665 |
Wikimedia Commons (Rijksmuseum Amsterdam) | CC0 1.0 Universal (Rijksmuseum public domain dedication) |
| The Rise of the Multinational Corporation | An aerial view of Ford Motor Company's sprawling River Rouge plant in Dearborn, Michigan, photographed in 1973 as part of a federal environmental survey of major industrial sites. Author: Joe Clark (EPA DOCUMERICA program) · 1973 |
U.S. National Archives (NARA), DOCUMERICA program | Public domain (US federal government work) |
| The Silk Roads and the Movement of Goods and Ideas | A silk map from the Western Han dynasty Mawangdui tombs illustrates the cartographic and textile sophistication of the era that gave the Silk Road its name. Author: Unknown (Western Han dynasty artisan) · 183-168 BCE |
Wikimedia Commons | Public domain (faithful photographic reproduction of a 2-D public domain artwork; PD-old) |
| The Standardization of Time and International Commerce | An 1884 diagram from Popular Science Monthly compares the newly adopted U.S. standard railway time zones to Greenwich Mean Time, illustrating the standardization that made scheduling commerce easier. Author: Artist unknown (Popular Science Monthly, Vol. 26) · circa 1884-1885 |
Wikimedia Commons | Public domain (published before 1928; CC Public Domain Mark) |
| The Suez Canal and the Shortcut to Asia | An 1869 illustration by Edouard Riou depicts the inauguration ceremony of the Suez Canal at Port Said, which opened a direct shortcut between Europe and Asia. Author: Edouard Riou · 1869 |
Wikimedia Commons | Public domain (published before 1928; artist died 1900) |
| The Swahili Coast and the Indian Ocean City-States | This 1909 illustration shows dhows anchored in Zanzibar Harbour, the traditional sailing vessels that linked the Swahili coast city-states to Indian Ocean trade. Author: A. E. M. Anderson-Morshead · 1909 (depicting traditional dhows long used on the Swahili coast) |
Wikimedia Commons | Public domain (published 1909, pre-1928) |
| The Telegraph and Faster Commercial Communication | An 1865 engraving from Harper's Weekly depicts the steamship Great Eastern laying the transatlantic telegraph cable, which sped up commercial communication across the ocean. Author: Artist unknown (published in Harper's Weekly) · 1865 |
Wikimedia Commons | Public domain (published before 1928; no known copyright restrictions) |
| The Trans-Saharan Trade Routes | The Djingereber Mosque in Timbuktu, photographed in the early 1900s, stands in the city that became a legendary terminus of the trans-Saharan caravan trade. Author: Edmond Fortier · Photographed 1905-1906; mosque built 1327 |
Wikimedia Commons | Public domain (photographer died 1928; published before 1931) |
| Trade Along the Nile River | A painted wooden model of a travelling boat from a Middle Kingdom Egyptian tomb depicts the kind of vessel used to move people and goods along the Nile. Author: Unknown (Egyptian craftsman, tomb of Meketre workshop) · ca. 1981-1975 BCE, Middle Kingdom, Dynasty 12 |
The Metropolitan Museum of Art (Open Access) | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| Trade and Tribute in Ancient Mesopotamia | This Ur III period cuneiform tablet, impressed with a cylinder seal and dated to about 2040 BCE, records deliveries of oxen within Mesopotamia's administered economy of trade and tribute. Author: Unknown · ca. 2040 BCE (Ur III period, Neo-Sumerian) |
Metropolitan Museum of Art | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| Trade Networks Across the Pre-Columbian Americas | A gold nose ornament crafted by Moche artisans in ancient Peru, the kind of high-value worked metal object exchanged through pre-Columbian Andean trade networks. Author: Unknown (Moche artist) · 1st-3rd century CE |
The Metropolitan Museum of Art (Open Access) | CC0 1.0 Universal (Metropolitan Museum of Art Open Access) |
| Venice, Genoa, and the Rivalry for Mediterranean Trade | Canaletto's view of the Piazzetta and Riva degli Schiavoni, painted around 1736–1738, captures the Venetian waterfront that anchored the city's Mediterranean trading power. Author: Canaletto (Giovanni Antonio Canal) · ca. 1736–1738 |
Wikimedia Commons | Public domain (painted ca. 1736–1738; artist died 1768) |
| Zheng He's Treasure Fleets and Ming China's Maritime Reach | This woodblock-printed page from the Wubei Zhi's Mao Kun map, digitized by the Library of Congress, charts the sea route of Zheng He's Ming dynasty treasure fleet voyages. Author: Mao Yuanyi (compiler); cartographer unrecorded · Depicts early 15th-century voyages (1405–1433); this printed edition compiled 1621, Ming dynasty |
Wikimedia Commons (digitized by Library of Congress) | Public domain (Ming-era woodblock print; Library of Congress, no known restrictions) |
Original illustrations
Compass marks, route-line motifs, and decorative map graphics used across Trade Triad's header, hero sections, and era cards are original SVG illustrations created for this site and are not based on any copyrighted map or chart.