590 A.D.

Lavos Timeline

-Queen Leene marries into the Guardia royal family.
-Cyrus and Glenn recover the Hero's Medal from the Frog King. 
-Cyrus obtains the Masamune.
-Magus breaks the Masamune in a fight with Cyrus and Glenn. 
-Cyrus is murdered by Magus and Ozzie; Glenn becomes Frog by Magus's spell. 
-Frog buries Cyrus in the Northern Ruins of Choras.
-Cyrus haunts the ruins.

Keystone T-1

-Queen Leene marries into the Guardia royal family.
-Cyrus and Glenn recover the Hero's Medal from the Frog King. 
-Cyrus obtains the Masamune.
-Magus breaks the Masamune in a fight with Cyrus and Glenn. 
-Cyrus is murdered by Magus and Ozzie; Glenn becomes Frog by Magus's spell. 
-Frog buries Cyrus in the Northern Ruins of Choras.
-Cyrus haunts the ruins.

Keystone T-2

-Queen Leene marries into the Guardia royal family.
-Cyrus and Glenn recover the Hero's Medal from the Frog King. 
-Cyrus obtains the Masamune.
-Magus breaks the Masamune in a fight with Cyrus and Glenn. 
-Cyrus is murdered by Magus and Ozzie; Glenn becomes Frog by Magus's spell. 
-Frog buries Cyrus in the Northern Ruins of Choras.
-Cyrus haunts the ruins.

From: Chronology