Answer:
1200 to 1250 AD
Step-by-step explanation:
Beowulf is a great and longest epic poem ever known to man during the medival period. It was composed inorder to show the achievements of the anonymous hero especially towards his fight with a monster called Grendel and with another called dragon which guides great treasure of golds.
Nobody knows for certain the exact time it was written but scholars guessed that it should be within the 11th century.