Machu Picchu was built in a certain style.
 However, a 2021 study led by Burger used radiocarbon dating (specifically, AMS) to reveal that Machu Picchu may have been occupied from around 14201530 AD
 The research documents that, starting in 1911, with the publications of American historian and explorer Hiram Bingham, the name Machu Picchu became associated with the ruins

