What was the most important effect of Ramses II’s long reign? He commissioned many works of art.
The kingdom was stable and at peace.
Egypt began to worship one god during his reign.
He returned Egypt to its original religious practices.

Perhaps the best-known achievements of Ramesses II are his architectural endeavors, building more monuments than any other pharaoh, most notably the Ramesseum and the temples of Abu Simbel south in Aswan. King Ramesses II's tomb, the Ramesseum in the West bank of Luxor, is a memorial temple complex near Luxor. So He commissioned many works of art. The answer is The kingdom was stable and at peace.

Explanation:

He extended the empire to Thebes. He lost land through unfavorable treaties. He lost territory to Egypt's enemies in battle.

It’s my birthday hope this helps.