Background
He was born Gheorghe Călmaşul, son of the Câmpulung headman, Teodor Călmaşul, and younger brother of Ioan Teodor Callimachi, Prince of Moldavia from 1758 to 1761.
He was born Gheorghe Călmaşul, son of the Câmpulung headman, Teodor Călmaşul, and younger brother of Ioan Teodor Callimachi, Prince of Moldavia from 1758 to 1761.
Gheorghe Callimachi took monks" orders at the Putna Monastery, receiving the name of Gavriil. Gavriil founded the Sf. George Cathedral in Iaşi, where he was later buried, on February 20, 1786.