She was given in marriage, in the 1790s, to the Imeretian king Solomon II, who later fought his brother-in-law and Katsia's successor, Grigol Dadiani, over territorial disputes.

[1] Therefore, Solomon had to designate his closest legitimate relative and a son of an old adversary, Prince Constantine, as heir apparent in 1804.

He offered armed resistance to the Russian troops sent in to reinforce the tsar's decision to depose Solomon in February 1810.

According to one account, in her last years, Mariam personally asked the tsar to allow Solomon II's peasant servant Salaridze, who had helped the king to escape from Russian captivity back in 1810, to return from his exile in Siberia.

The permission was granted and Mariam hosted Salaridze at her house, only to find him dead of a heart attack on the next morning.