Antonio de Martí Franqués, Antoni Martí i Franquès or Marti d'Ardenya (14 June 1750 – 19 August 1832) was a Catalan noble and polymath who contributed to ideas in biology, geology, meteorology and chemistry. He was largely self-taught, amassed large collections of books, learned several European languages and conducted experiments to verify, establish and test his ideas at a time when claims were generally taken for granted.