Matthew Asen Kantakouzenos or Cantacuzenus (Greek: Ματθαίος Ασάνης Καντακουζηνός, Matthaios Asanēs Kantakouzēnos, Bulgarian: Матей Асен Кантакузин, "Matey Asen Kantakuzin" c. 1325 – 15 June 1383) was Byzantine Emperor from 1353 to 1357.