The actors of the commedia represented fixed social types. These types included tipi fissi, for example, foolish old men, devious servants, or military officers full of false bravado. Characters such as Pantalone , Dottore Gratiano , or Arlecchino , began as satires on Italian "types" and became the archetypes of many of the favourite characters of 17th- and 18th-century European theatre.