With such a huge empire the Incas needed to keep accounts - but their methods were mysterious and similar to modern computing.
Wile the Incas held their emperor as all powerful, there were other important tiers in society, including the family.
The Incas were amazing architects and constructed temples and buildings that have survived thousands of years.
It wasn't until 1908 that a chronicle of ancient Incan culture was discovered mysteriously in Copenhagen.
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