It has been sought for centuries but remained a mystery, still out of reach. Now an expert has pinpointed a site that could be Atahualpa’s resting place: the last Inca emperor’s tomb.

“This is an absolutely important find for the history of Ecuador’s archeology and for the (Andean) region,” said Patrimony Minister Maria Fernanda Espinosa, speaking of the ruins found by Ecuadoran historian Tamara Estupinan.

The Inca empire, in the 1400s and early 1500s, spanned much of South America’s Andean region, over 1,000 miles (1,600 kilometers), from modern-day Bolivia and Peru to Argentina, Chile, Ecuador and Colombia. It included dozens of ethnic groups with different languages, cities, temples, farming terraces and fortresses.