Mentioned in the inscription on his own tomb, which was kept in the Church of Saint Athanasius in Lešok. He was a priestmonk (Anthonije/Anьtonije), then Bishop of the region Lower Polog (Iōanikie). After the year 1308 the Church of Saint Athanasius in Lešok was found by the Priestmonk Antonije (Izvoleniemь ōca i vьplьšteniemь sina i pospěšeniemь svetago duha azь eriomonaahь Anthonie pridohъ vь sie město i rastiždahь i raskopahь gabryi i uravnihь bregove i načehь si hramь zidati svetago athanasija vь dni kralja milutina i vtorago kralja sina mu stefana i tretiego kralja sina mu dušane). Between the years 1346 and 1355 Antonije was appointed Bishop of Lower Polog by the Serbian Patriarch Joanikije II, who has given him the name Iōanikie (i prizva patriarha blьgarskago i arhiepiskupa srьbskago iōanikija i stvori zborь u skopi i blagosloviše ego na carьski sanь i bystь prvonastolny carь srbskoi zemli i grčkoi i pomorskoi arhiepiskupa iōanikija blagosloviše na patriarhiju srbskoi zemli vь to carstvo blagosloviše anьtonija na episkupstvo dolnemu pologu prvonastolna po izvoleniju božiju prětvoriše ime jemu iōanikie poneže něe bilo prěge episkupь polozě).