Who said "The past cannot be changed, only learned from."?

This quote is attributed to Rhaegar Targaryen.

The past cannot be changed, only learned from. - Rhaegar Targaryen

"The past cannot be changed, only learned from."

Rhaegar Targaryen History

"The dragon has three heads."

"I have a duty to my realm and to the future."

"Music is the voice of the soul."

"Love is the most powerful force in the world."

"I've seen a lot of things in my time."

"That's how we archaeologists tell time."

"We must learn from history or be doomed to repeat it."

"Every artifact tells a story."