Franciscus Patricius (Croatian: Franjo Petriš or Frane Petrić, Italian: Francesco Patrizi; 25 April 1529 – 6 February 1597) was a philosopher and scientist from the Republic of Venice, originating from Cres. He was known as a defender of Platonism and an opponent of Aristotelianism. His national origin differs in sources, and he is described both as Croatian and as Italian. In Croatia he is mostly referred to as Franjo Petriš or Frane Petrić (sometimes Petris, Petrišević and Petričević). His family name in Cres was known as Petris.