As the reign of Peter I progressed, the Academy gradually changed into an upper level theological educational establishment as the many new professional schools assumed the roll of secular education. Then, in 1721, administration of the Academy was transferred to the [[Holy Synod]].
With the election of [[Platon II]] as [[Metropolitan]] of Moscow in 1775 a number of changes took place at the Academy. New disciplines were introduced into the academic curriculum including law, ecclesiastic history, medicine, and a broadened selection of ancient and new European languages. In 1775, the name of the Academy was officially changed to the '''Slavic Greek Latin Academy''', and its activities were coordinated with the Troitskaya Theological Seminary at the Trinity-St. Sergius Lavra. Additionally, publishing activities at the Academy were revived which included publication of popular books on Orthodox Christianity.
In 1814, the Slavic Greek Latin Academy was transformed into the '''Ecclesiastical Academy''' and relocated to the grounds of the Trinity-St. Sergius Lavra. Through the nineteenth century the Academy was the principal theological school of the Russian Orthodox Church. In 1888, the school trained more than 300 theological students. In 1892, the Academy began publishing the ‘‘Bogoslovsky Vestnik’‘, the most authoritative journal in Russia on Orthodoxy. Gorsky-Platonov and Fr. [[Pavel Florensky]] are among those who were editors of the journal.