Pompey's Bridge

The site known as Pompey’s Bridge occupies a unique position in the geography of Mtskheta, sitting partially submerged beneath the Mtkvari River. While modern maps and casual observers may overlook the location, it represents a profound intersection of Roman engineering and Georgian medieval history. The site consists of the foundation remnants of what was once a critical crossing point, essential for the movement of armies and goods across the Caucasus. Its current state, dictated by the industrial requirements of the 20th century, adds a layer of complexity to its identity as both a historical monument and a vanished architectural entity.

The Roman Campaign and Strategic Origins

Historical consensus points to the 1st century BC as the dawn of a permanent crossing at this site. During his expedition through Iberia in 65 BC, the Roman general Pompey the Great sought to solidify control over the region. The construction of a bridge at the confluence of the Mtkvari and Aragvi rivers served a clear military purpose: to facilitate the rapid deployment of Roman legions and ensure the flow of supplies into the heart of the kingdom. While the original Roman structure has long since been lost, the placement of the bridge is consistent with Roman military doctrine, which prioritized secure river crossings to maintain dominion over newly annexed territories.

Architectural Evolution through the Centuries

Following the withdrawal of Roman forces, the bridge became a cornerstone of local infrastructure for subsequent Georgian dynasties. Its upkeep was viewed as a strategic necessity rather than a luxury, as it was one of the few points where the Mtkvari could be reliably crossed during the seasonal floods. Architectural milestones include:

• The Gorgasali Era: According to historical records, the bridge saw significant expansion and fortification efforts during the reign of King Vakhtang Gorgasali in the 5th century AD.
• Medieval Resilience: Throughout the Middle Ages, the structure was frequently damaged during various invasions, leading to successive layers of masonry being added. The foundation style reflects a blend of Roman foundational techniques—characterized by massive stone blocks and mortar—layered with the more localized stonework common in Kartli architecture.
• Reconstruction Phases: The remnants visible today during low-water events largely date to the 17th and 19th centuries, when trade along the Silk Road necessitated heavy, frequent repairs to keep the passage viable for merchant caravans.

Industrial Impact and the Submergence of History

In 1926, the landscape surrounding the bridge underwent a permanent, irreversible transformation with the construction of the Zemo Avchala Hydroelectric Power Station (ZAhes). As one of the first major electrification projects in the Soviet Caucasus, the dam created a reservoir that fundamentally altered the hydrology of the valley.

To ensure the structural integrity of the dam and prevent the accumulation of debris against the bridge foundations, the state-ordered modifications required the partial destruction of the bridge’s iconic stone arches. What remains is a series of submerged piers that serve as the primary underwater anchor for the historical record of the region. The bridge is no longer an active crossing but a silent witness to the industrialization of the Mtkvari valley, revealing itself only when the dam operators lower the water levels for essential engineering maintenance.