This appears to be a management change in an existing property,
Liberatador Palacio del Inka. Addresses are the same. In such a case, I'd have near 100% confidence in the opening date. It's interesting to look at the
Libertador home page, and see the Lima Westin and Luxury Collection Tamba del Inka and Paracas properties. Perhaps there are still more to bring over? It would be great if the Arequipa property comes under the Starwood banner.
Nice find,
SometimesFlyer!