Basla bridge as an important strategic military object was used in all likelihood, in the XI-XII centuries. This is evidenced not only its architecture, but also the results of the study the inscriptions on the stone side of the bridge, made on ancient Georgian asomtavruli, with the text Christian content.

Proven historians, exploring the region, through the valley of the Basla river (Basla) passed an important transportation route that connected the several valleys. In connection with the character of the local mountain rivers, fording a large number of people and goods was very difficult or impossible in the period of snow melting in the mountains, so the only solution was the construction of the bridge.

The bridge on the Basla, or the Queen Tamar Bridge was built according to the canons of architectural art in the form of a single-span stone (that is, without support) arch. Complex was made from local limestone, each plate of the arch has given a wedge shape, so after Stripping the Central plate was compressed between the stronger, the larger the load attached to them. The span has a length of 13 meters and feet from shore the whole length of the bridge is 35 meters. The roadway surface is raised above the water by about 9 meters, which significantly reduces the magnitude of the gradient of the road on both sides of the bridge, and a five-meter width was allowed to use it for double-row movement.

Despite eight centuries of its very non-Museum existence in the harsh mountain conditions, the bridge now has a permitted capacity of 8 tons. The secret of its longevity not only in the art of designers, but also the ability of builders who were able to choose the stone material of sufficient strength. In addition, the stone at that time laid on lime mortar with the addition of egg white, which gave him tremendous strength and durability.