The sun symbolizes the ruler of heaven, while the lion symbolizes the lineage of kings as well as royalty and divinity. It is a famous motif that has been used throughout history since the ancient times.
During the Qajar era, the Sun and the Lion symbol became a national emblem. The symbol’s meaning changed several times between this era and the 1979 revolution but it remained the official emblem of Iran until the revolution, when it was removed from government organizations and public spaces and replaced by the present-day emblem.