The document has been sold for a cool €100,000.
Dublin auctioneers Whyte’s placed an estimate of €120,000 on the document, which was due to go under the hammer on September 15, but was withdrawn before the auction.
According to The Irish Times, the copy was sold to an anonymous buyer before it was due to appear at auction.
There are no details of the buyer available but it is understood they are from Ireland.
The document is something of a hot ticket as there are thought to be only around 30 original copies left of an original printing of less than 500.
At least six copies are in public institutions such as Dáil Éireann, the National Museum and University College Dublin.
Two exist in British Government archives and there is one in the Royal Collection in Buckingham Palace.
The 1916 proclamation was issued by the Irish Volunteers and the Irish Citizen Army and proclaimed Ireland independent from the United Kingdom.