The document signed by Congress and enshrined in the National Archives is usually regarded as "the" Declaration of Independence, but historian Julian P. Boyd argued that the Declaration, like Magna Carta, is not a single document. Boyd considered the printed broadsides ordered by Congress to be official texts, as well. The Declaration was first published as a broadside that was printed the night of July 4 by John Dunlap of Philadelphia. Dunlap printed about 200 broadsides, of which 26 are known to survive. The 26th copy was discovered in The National Archives in England in 2009.