when was it published?
4 July, 1776
United States Declaration of Independence
After Congress approved the final wording of the Declaration on July 4, a handwritten copy was sent a few blocks away to the printing shop of John Dunlap. 
who was the declaration of independence written by It was drafted by The Committee of Five, whose members included John Adams and Thomas Jefferson among others who signed it? Representatives of New Hampshire, New York, Connecticut and others
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United States Declaration of Independence [SEP] Publication and reaction
After Congress approved the final wording of the Declaration on July 4, a handwritten copy was sent a few blocks away to the printing shop of John Dunlap. Through the night, Dunlap printed about 200 broadsides for distribution. Soon, it was being read to audiences and reprinted in newspapers throughout the 13 states. The first formal public readings of the document took place on July 8, in Philadelphia (by John Nixon in the yard of Independence Hall), Trenton, New Jersey, and Easton, Pennsylvania; the first newspaper to publish it was the "Pennsylvania Evening Post" on July 6. A German translation of the Declaration was published in Philadelphia by July 9.