What is the name of the Assassin's Creed artifact that projects a holographic map in the first game?

The artifact that projects a holographic map in the first Assassin's Creed is the Apple of Eden.

The Apple is one of the series' Pieces of Eden, technologically advanced artifacts created by the First Civilization, also called the Isu. In the first game, Altaïr encounters the Apple after the attack on Solomon's Temple and later studies it at Masyaf. Its projected display reveals a world map and reinforces the mystery surrounding the ancient civilization.

The Apple is more than a map device. Across the series, Apples can influence minds, create illusions, and manipulate or display information. Their abilities explain why Assassins and Templars repeatedly compete to obtain them.

Other Pieces of Eden include the Staff, Swords, and Shrouds, but these are distinct artifacts with different histories and functions. The Apple of Eden is therefore the precise answer for the first game's spherical, projection-producing relic, rather than a general label such as “Piece of Eden.”