Don Marziano Lavarello (17 March 1921 – 7 October 1992), commonly self-styled as Emperor Marziano II Lavarello Lascaris Paleologo or Marziano II Lavarello Obrenovic, was an Italian eccentric, forger and pretender. Claiming to be the head of the Laskaris dynasty, which had ruled the Byzantine Empire in Nicaea from 1204 to 1261, and also claiming relations to the empire's last ruling dynasty, the Palaiologoi, Lavarello claimed to be the rightful Emperor of Constantinople. Through supposed connections to the Obrenović dynasty, previous rulers of Serbia, Lavarello also claimed to be the rightful King of Serbia.