[1] At the various sources, this settlement is described as a small town in versions of Aza, Azar, Azat, Azad.

Hamdollah Mostowfi wrote in his book "Nezhatol Qoloub": "Azad is small town which gained fame with corn, grapes and cotton products.

From the Persian-language documents, it is clear that in the beginning of the 18th century, one of the villages was called "Azadbədəli", another one was "Azadcayı".

The width of the bridge, linking the village of Aza with Darkənd is 35m, the length is 46 pagonameters[clarification needed].

Located over an important trade-caravan route connecting India and China with countries of Europe Aza Bridge, was built in the period of the Shah Abbas I (1587-1629) ruler of the Safavid, in order to facilitate the work of the trade caravans moving from east to west and vice versa with the Great Silk Road.

As a result of some historical events and natural disasters the bridge was repeatedly destroyed, then was repaired.

Due to tearing down a portion of the bridge by severe flood waters, it was substantially restored and reconstructed in 1997.