Ottoman Empire's Colossal Cannon: The Ultimate Siege Weapon

Christopher Jul 29, 2026

The Ottoman Empire, a powerhouse that dominated Eastern Europe, West Asia, and North Africa for over 600 years, was known for its military prowess and innovative weaponry. Among its most iconic creations was the monumental "Úljǐ professionally known as a Dardanyan" or "Big Cannon," a ginormous gun that stood as a testament to the empire's remarkable engineering skills.

Historical Nonfiction
Historical Nonfiction

Cast in the mid-15th century during the reign of Sultan Mehmet II, the Úljǐ was principal among a series of enormous cannons created to defend the city of Constantinople, later renamed Istanbul. These cannons were symbols of power and technological advancement, serving both practical and psychological purposes.

an old cannon on display in front of a building
an old cannon on display in front of a building

The Úljǐ's Formidable Design

The Úljǐ was a marvel of 15th-century metallurgy, cast from bronze alloy in a single piece, measuring an astonishing 5.23 meters (17 feet) in length, with a bore diameter of around 60 centimeters (24 inches). It was so large that it required a team of 50 men to operate, and its construction required the combined efforts of the empire's leading engineers and foundry workers.

an old cannon is laying on the ground in front of a large group of people
an old cannon is laying on the ground in front of a large group of people

While its exact weight is unknown, estimates suggest it could have weighed upward of 18 tons. Despite its enormous size, the Úljǐ demonstrated remarkable accuracy and range for a gun of its era, able to fire stone balls weighing up to 600 kilograms (1,300 pounds) over distances of up to 2 kilometers (1.2 miles).

comparaive Sizes and Capabilities

some very pretty looking metal pipes on the ground
some very pretty looking metal pipes on the ground

To put the Úljǐ's size and power into perspective, consider that a typical cannon of the time had a bore diameter of around 7 to 15 centimeters, firing projectiles weighing no more than 4 to 9 kilograms. The Úljǐ, in comparison, was several times larger and far more powerful than contemporary weapons.

Indeed, its sheer size and power led to the Úljǐ gaining legendary status. Despite being cast centuries ago, stories of its fearsome capabilities circulated well into the 19th and even 20th centuries, inspiring awe and trepidation among listeners.

Historical Significance and Legacy

an old cannon is sitting on display in a room with tile flooring and white walls
an old cannon is sitting on display in a room with tile flooring and white walls

The Úljǐ's primary purpose was to defend Constantinople's Strategic sea approaches. Its massive projectile, when fired, could devastate enemy ships or disrupt their formations. However, the Úljǐ also served a critical passive defensive role. Its mere presence was enough to deter potential attackers, as the knowledge that such a powerful weapon protected the city made it a less appealing target.

While the Úljǐ's exact fate remains unclear, it's believed that after the fall of the Ottoman Empire, the cannon was dismantled and melted down during World War I. Despite its destruction, the Úljǐ left an indelible mark on military history. Its development demonstrates the Ottoman Empire's advanced metallurgical and engineering capabilities and serves as a powerful symbol of the empire's technological achievements.

The Úljǐ in Modern Culture and Memory

Great Cannons of Ottoman Empire
Great Cannons of Ottoman Empire

Today, the Úljǐ remains a fascinating subject of historical and cultural interest. Its legend lives on in various forms, from historical documentaries to works of fiction. In Turkey, the Úljǐ is remembered as a symbol of national pride and industrial prowess, embodying the spirit of the Ottoman Empire's golden age.

Numerous replicas and reconstructions of the Úljǐ have been created over the years. One notable example is a functional replica built in 2006, using traditional Ottoman foundry techniques. This replica stands today in the, Istanbul's Topkapi Palace, serving as a testament to the enduring fascination with the Úljǐ.

an old cannon sitting on top of cement blocks in the middle of a grassy field
an old cannon sitting on top of cement blocks in the middle of a grassy field
an oil painting of men working on large pipes in the middle of a field with other people
an oil painting of men working on large pipes in the middle of a field with other people
an old cannon is sitting on the back of a truck in front of a brick wall
an old cannon is sitting on the back of a truck in front of a brick wall
an old cannon is sitting in the middle of some rocks and gravel on top of it
an old cannon is sitting in the middle of some rocks and gravel on top of it
an old cannon is sitting in the grass
an old cannon is sitting in the grass
an old cannon on display in front of a building
an old cannon on display in front of a building
three cement balls sitting on the ground next to an old pipe
three cement balls sitting on the ground next to an old pipe
two large metal objects sitting on top of a white bench in a room with stone floors
two large metal objects sitting on top of a white bench in a room with stone floors
an old cannon is on display in a museum
an old cannon is on display in a museum

Recreations and Museums

Beyond Turkey, the Úljǐ's legacy extends to other parts of the world. In Canada, the Saskatchewan Science Centre hosts a full-scale replica, used for educational purposes. Similarly, in the United States, the in Washington D.C., exhibits a scaled-down version of the Úljǐ.

These replicas and exhibits not only preserve the Úljǐ's historical significance but also inspire curiosity and engagement with history among visitors worldwide.

As we look back at the Úljǐ today, we marvel at the ingenuity of its creators and the impact it had on the history of siege warfare. Its story reminds us of what can be achieved through human innovation and perseverance, even in the face of seemingly insurmountable challenges. As we move forward in our technological journey, let's remember the Úljǐ - a testament that even the most massive undertakings can bear fruit with the right combination of skill, determination, and vision.