Gregory Bicskei was a prelate in the Kingdom of Hungary at the turn of the 13th and 14th centuries. He was the elected Archbishop of Esztergom between 1298 and 1303. Supporting the claim of the Capetian House of Anjou, he was a tough opponent of Andrew III of Hungary. He crowned Charles I king with a provisional crown in 1301. He was murdered in Anagni by soldiers whom Philip IV of France had sent to Italy to capture Pope Boniface VIII.

The Archdiocese of Esztergom–Budapest is a Latin Church archdiocese and primatial seat of the Catholic Church in Hungary and the metropolitan see of one of Hungary's four Latin Church ecclesiastical provinces.