Abraham worshiped God by building a cube shaped altar and offering a sacrifice. In time this cube shaped edifice became representative of God. You see, the God of Abraham was everywhere. He did not live in a house.

What is the cube in the middle of Mecca?

Kaaba, also spelled Kaʿbah, small shrine located near the centre of the Great Mosque in Mecca and considered by Muslims everywhere to be the most sacred spot on Earth.

What is inside the black box in Mecca?

Is there anything inside? The Kaaba is built around a sacred black stone, a meteorite that Muslims believe was placed by Abraham and Ishmael in a corner of the Kaaba, a symbol of God's covenant with Abraham and Ishmael and, by extension, with the Muslim community itself.