He is known for his oft-cited French-language history of the Georgian Christianity, L'Eglise géorgienne des origines jusqu' à nos jours, published in Rome in 1910.

[1] Michel Tamarati was born as Alexander Tamarashvili (ალექსანდრე თამარაშვილი) in the Georgian Catholic family in Akhaltsikhe, then part of the Russian Empire.

Considered by the Imperial Russian authorities to be politically unreliable, Tamarashvili left Georgia and finally settled, in 1891, in Rome, where he, now known as Michel Tamarati, obtained a doctorate in theology from the Pontifical Academy of St. Thomas Aquinas in 1894.

He spent years in the archives of Europe, studying the hitherto unexplored history of Roman Catholicism in Georgia and the Georgian–Western European cultural and political interaction.

[2] Tamarati's best-known work, L'Eglise géorgienne des origines jusqu' à nos jours ("The Georgian church from the beginning to the present"), was published in Rome in 1910, winning a special prize from the Holy See.