The fortress was the work of a dynasty. In the fifteenth century, Meñli Giray, khan of the newly powerful Crimean Khanate, began the fortifications at the Perekop isthmus, and his son Sahib I Giray carried the work forward. The Giray line would rule Crimea for centuries, and they understood their geography perfectly: their peninsula was almost an island, joined to the continent only by this slender bridge of land. Fortify the bridge, and you fortify everything. So they built at Or Qapi a stronghold of earthen ramparts faced with stone, positioning it astride the one road that led in and out. It was less a castle than a checkpoint on the grandest possible scale, controlling passage to an entire nation.

A gate, however strong, invites the battering ram. During the Russo-Turkish War of 1735 to 1739, the Russian field marshal Burkhard Christoph von Münnich brought the empire's armies against the fortifications. On the seventeenth of June 1736, his forces stormed the works and left the Tatar fortress in ruins. Two years later Russian troops under General Lacy took the position again. The Trench Gate had held back many, but it could not hold back the expanding Russian Empire, and the storming of Or Qapi marked a turning point in the long contest for control of Crimea, one that would end with the peninsula absorbed entirely.

The fortress never recovered its old power, and its last military life was brutal and brief. During the Second World War, the strategic ground it guarded changed hands repeatedly between Germany and the Soviet Union, the same narrow isthmus fought over yet again by armies who cared nothing for the khans who had first walled it. Now Or Qapi is a ruin among ruins, its ramparts weathered into the steppe. Yet the name endures, and it still means what it always meant. This was the gate, and beyond it lay a homeland worth the wall of earth built to defend it, a Crimean Tatar realm remembered in the very stones scattered across the ground.