Maura's Timeline of the Incas By gatestudentssms Jan 1, 1200 City of Cuzco formed Exact date unknown Jan 1, 1438 The Inca build Machu Picchu date unknown Jan 1, 1438 Emporer Pachacuti becomes emporer exact date unknown Period: Jan 1, 1463 to Jan 1, 1493 Empire size doubles exact dates unknown Jan 1, 1470 The Inca conquer Chimu Kingdom Actual date unknown Oct 12, 1492 Christopher Columbus finds America EXACT DATE!!!! Period: Jan 1, 1527 to Jan 1, 1532 Huascar and Atahualpa fight a civil war exact dates unknown Jan 1, 1532 Fransico Pizzaro begins the Incan Empire conquest Actual date unknown Jan 1, 1572 Tupac Amaru the last Incan emporer is executed Actual date unknown