X-ray and infrared imaging has revealed a long-hidden painting beneath "Portrait of Mateu Fernández de Soto," providing researchers with new insights into the artist's blue period

"Picasso often reused his canvases at this time because he did not have much money," the institute explained Historians recently made an unexpected discovery while examining one of Pablo Picasso’s paintings.

A portrait of a mystery woman was found under one of Pablo Picasso’s earliest Blue Period paintings, revealed using imaging technology. Courtauld Institute of Art conservators took x-ray and infrared images of the 1901 painting “Portrait of Mateu Fernández de Soto‚” a portrait of Picasso’s Spanish sculptor friend.