7456nazcaTTen-USVocabulário Colaborativo em Artes e Arquitetura active approved nazcaNazca" and "Nasca" are commonly used interchangeably, but generally prefer the use of Nazca to describe the region, town, and river; and Nasca to refer to the period and culture that inhabited this area.

Source: Art & Architecture Thesaurus

http://vocab.getty.edu/page/aat/300017290

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