The Benin Moat, also known as the Walls of Benin, holds a significant place in history as a remarkable feat of ancient engineering and a symbol of defense for Benin City in Nigeria’s Edo State. Dating back to around 800 AD and continuing to 1460 AD, these massive earthworks were constructed through extensive manual labor and earth repurposing, forming a structure of immense historical and cultural significance.
Spanning an estimated 16,000 kilometers and enclosing about 6,500 square kilometers of land, the Benin Moat was a formidable defensive system. Characterized by steep banks and a protective berm, it served to deter potential invaders, showcasing the advanced understanding of strategic defense possessed by the builders. Access to the city was controlled through nine carefully guarded gates, adding to the formidable nature of this ancient stronghold.
Today, the remnants of the moats persist in Benin City, offering a tangible connection to the past amidst the challenges posed by urbanization and land disputes. While the moats await official recognition by UNESCO, they were added as an extension to the World Heritage Site of the Royal Palaces of Abomey in 1995, underscoring their historical significance and cultural value.
The construction of the Benin Moat was accompanied by the building of a defensive wall made of limestone blocks, strategically enhancing the city’s defenses. The sheer scale and complexity of these structures are truly awe-inspiring, conveying the level of organization and dedication of the ancient inhabitants of Benin City.
Notably, the Benin Moat was described by Olfert Dapper in 1668 as the “Great Walls of Benin,” a testament to its enduring legacy and impact. Additionally, the Guinness Book of World Records recognized it in 1974 as one of the world’s largest man-made structures by length, positioning it as second only to China’s Great Wall.
The Benin Moat stands as a testament to the ingenuity, resourcefulness, and strategic prowess of the people of ancient Benin City, leaving an indelible mark on history as a marvel of human achievement.


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