Óláfs saga Tryggvasonar is the name of several closely related works on the life of the king Olaf Tryggvason - these include :
A lost version in Latin by Oddr Snorrason A lost version in Latin by Gunnlaugr Leifsson Óláfs saga Tryggvasonar in Heimskringla A version in the Fagrskinna Óláfs saga Tryggvasonar en mesta also known as Mesta or the Greatest Saga of Óláfr Tryggvason Óláfs saga Tryggvasonar in Flateyjarbók (a version of Mesta)