This is the 3836th most frequent Spanish word.
siglos
Centuries.
Here, 'siglos' denotes a time period, specifically centuries, emphasizing the long history of the temples' existence.
Los templos construidos hace siglos todavía se mantienen de pie.
The temples built centuries ago still stand.
In this sentence, 'siglos' is used metaphorically to express a very long time, not literally centuries but giving a sense of prolonged duration.
Han pasado siglos desde la última vez que visité este lugar.
Centuries have passed since the last time I visited this place.
'Siglos' describes a continuous span of time across centuries in which the book has had an impact on literature.