In 1911, Yale historian and explorer Hiram Bingham brought the "lost" city to the world's attention.

Machu Picchu, a lost city located in Peru's tropical mountain forests, wasn't discovered by American explorer Hiram Bingham until 1911.

Peru was seeking to retrieve the artifacts now because it aimed to put them on public display in 2011 for the centenary of Machu Picchu's rediscovery by U. S. explorer Hiram Bingham.