What year did the Inca civilization begin?

The Incas were noticed in the 12th century CE/ AD in South America. They were living on the west part of the continent between the todays Equador and South Chile and Argentina along the Andes.

They confronted the Spanish expansion and were defeated by 1532 CE/ AD where their history takes an end.

Rituals of their believes are still performed in their former regions especially the remote ones.

One of the most famous monument that someone can find is the Machu Picchu city/ retreat