Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Fuerte de Samaipata' has mentioned 'Empire' in the following places:
Occurrence Sentence Text Source
According to a 17th-century Spanish chronicler, Diego Felipe de Alcaya, the Incas, probably late in the reign of Tupac Yupanqui (ruled 1471-1493), began the incorporation of the Samaipata area into the empire.
As with other Inca administrative centers on the frontiers of the empire (such as Oroncota), Samaipata was protected by outlying fortresses.