How did Lincoln find a way to use his constitutional powers to end slavery?

This Presidents and the Constitution e-lesson focuses on Abraham Lincoln and the Emancipation Proclamation. Though he had always hated slavery, President Lincoln did not believe the Constitution gave him the authority to bring it to an end-until it became necessary to free the slaves in order to save the Union. With the Emancipation Proclamation, which he viewed as an essential wartime measure to cripple the Confederacy’s ability to fight, Lincoln took the first step toward abolition of slavery in the United States.

the minoan civilization flourished in the middle bronze age on the island of crete located in the eastern mediterranean from c. 2000 bce until c. 1500 bce. with their unique art and architecture, and the spread of their ideas through contact with other cultures across the aegean, the minoans made a significant contribution to the development of western european civilization as it is known today. labyrinth-like palace complexes, vivid frescoes depicting scenes such as bull-leaping and processions, fine gold jewelry, elegant stone vases, and pottery with vibrant decorations of marine life are all particular features of minoan crete.  

so basically their unique way of ding arts, as well as architecture.