The See of Vicina and the New Metropolis
Before his Wallachian appointment Iachint led the metropolis of Vicina, a see located in Dobrudja near the Danube. Sources describe his time there as marked by the disturbances of the age, including pressure from Tatar and Genoese incursions in the region.
The establishment of a metropolis for Wallachia answered the needs of a principality that had recently consolidated as a state. At the request of Prince Nicholas Alexander Basarab, the Patriarchate of Constantinople, under Patriarch Callistus I, issued synodal documents in May 1359 transferring Iachint from Vicina to the Wallachian capital at Curtea de Arges and recognizing the Metropolis of Ungro-Wallachia, with its clergy directed to receive him as their lawful shepherd.