Answer:
It was destroyed by the Almoravids, who took control in the country for the next ten years.
Explanation:
The sacking of Ghana by Almoravids in something that can be seen even as a holy war led to the decline of its power and its trade links. Although their rule lasted for only a couple of years, they weren't able to recover and to extent their trade once more as they did before this event.
Basically, by purchasing an indulgence, an individual could reduce the length and severity of punishment that heaven would require as payment for their sins, or so the church claimed. Buy an indulgence for a loved one, and they would go to heaven and not burn in hell.
Johannes Kepler discovered that planets move in elliptical orbits
The answer is what you want to believe