Vasile Lupu
The church was erected between 1637 and 1639, in the Moldavian capital, in honour of the Three Holy Hierarchs of Eastern Orthodoxy (Basil of Caesarea, Gregory of Nazianzus, and John Chrysostom), and was blessed by Bishop Varlaam. In 1640, Prince Vasile Lupu, the renowned defender of the Orthodox Church, set up here the first printing press in Moldavia and the Vasilian College, a higher education institute. In 1643, the first volume ever printed in Moldavia was issued in Iași. The Trei Ierarhi Church was dedicated by Vasile Lupu to the 20 monasteries on Mount Athos.