The flags are one of several art installations on Temple Square symbolizing the global nature of the Church of Jesus Christ and its commitment to be a friend to all nations.
"Here [in the Kirtland Temple] … the Savior appeared on the breastplate of the pulpit, and after Him three heavenly messengers—Moses, Elias, and Elijah—restoring necessary keys for the kingdom to come back to the earth and to roll forward.”