 The stone step is less well preserved than the rest of the building, but a date in AD 571 has been deciphered.Due to the deforestation of the Copán valley, the Rosalila building was the last structure at the site to use such elaborate stucco decoration — vast quantities of firewood could no longer be spared to reduce limestone to plaster.A life-size copy of the Rosalila building has been built at the Copán site museum.