Luca Arbore or Arbure (Old Cyrillic: Лꙋка Арбꙋрє; Renaissance Latin: Herborus or Copacius; died April 1523) was a Moldavian boyar, diplomat, and statesman, several times commander of the country's military. He first rose to prominence in 1486, during the rule of Stephen III, Prince of Moldavia, to whom he was possibly related. He became the long-serving gatekeeper (or castellan) of Suceava, bridging military defense and administrative functions with a diplomatic career. Arbore therefore organized the defense of Suceava during the Polish invasion of 1497, after which he was confirmed as one of Moldavia's leading courtiers.