Background
Ioan was the second son of Teodor Calmăşul.
Ioan was the second son of Teodor Calmăşul.
Teodor, born Calmăşul, changed the family name to the Greek form Callimachi. Ioan"s older brother, Gavriil Callimachi (1689–1786) was a monk at Putna Monastery. Ioan pursued his studies at Lvov.
He knew Latin, Turkish, Italian, Greek and French.
Callimachi served in the administrations of Ioan Mavrocordat and of Grigore II Ghica. He was Grand Dragoman at the Ottoman Porte in Istanbul where, over the course of his sixteen years of service, he was recognized for his diplomatic ability.
In 1758, he was rewarded with the position of Prince of Moldavia which he held until 1761. Callimachi retired to Constantinople where he lived for 19 years before his death.