As a dowager queen of Georgia, she ruled as regent for her underage son, Bagrat IV, from 1027 to 1037, and was involved in diplomacy with the Byzantine Empire.

Mariam advocated the reconciliation between the brothers and made a futile attempt at bringing the rebellious Demetre back to loyalty.

During Bagrat’s enforced exile at the Byzantine court in the 1050s, Mariam accompanied her son and spent three years with him in residence at Constantinople during the reign of Constantine IX Monomachos.

These, however, persuaded the queen to refrain from visiting the Saracen-held Jerusalem; George the Hagiorite himself took her money and distributed it among the poor and the monasteries there.

[3] The death of Mariam is not mentioned in the chronicles; she was present at Bagrat IV’s deathbed in 1072,[4] and was certainly dead by 1103 when she is commemorated in the record of the Georgian church council at Ruisi–Urbnisi.