Codex Tchacos is important because it contains the first known surviving copy of the Gospel of Judas, a text that was rejected as heresy by the early Christian church and lost for 1700 years.
One stored it in a safe deposit box and another actually froze the documents, causing a unique and difficult kind of decay that makes the papyrus appear sandblasted.
It was not examined and translated until 2001 after its current owner, Frieda Nussberger-Tchacos, concerned with its deteriorating condition, transferred it to the Maecenas Foundation for Ancient Art in Basel, Switzerland.
Roughly a dozen pages of the original manuscript, seen briefly by scholars in the 1970s, are missing from the Codex today; it is believed that they were sold secretly to dealers, but none have come forward.
The Society also created a two-hour television documentary, The Gospel of Judas, which aired worldwide on the National Geographic Channel on April 9, 2006.