Dan Walsh did not realize he would be documenting more than 60 years of Palestinian history when he began assembling the world's largest collection of Palestinian posters decades ago. Yet, his Palestine Poster Project Archives (PPPA) might be joining the documentation registry of the world’s foremost heritage, which includes the Phoenician alphabet, the Magna Carta and Karl Marx’s “Das Kapital,” among others.

Some 1,700 posters, which represent the core of the Liberation Graphics Collection of Palestine Posters, have been nominated for the United Nations Educational, Scientific and Cultural Organization’s (UNESCO) Memory of the World program, which includes 301 heritage resources of “outstanding universal value.”

Since 2009, the 67-year-old Irish-American activist and graphic artist has been digitally archiving thousands of posters created by Palestinian and international artists in solidarity with the Palestinian’s quest for justice. Walsh’s collection includes almost 10,000 Palestinian posters by 1,900 artists from 72 countries.

“The story told, collectively, about contemporary Palestinian history is nowhere more complete, more engaging, more accessible, more easily comprehendible, more complete, more memorable, more approachable and more available for deeper analysis and even ownership, than in the narrative told by the Palestine posters,” Walsh said.