No single person authored the document; James Madison is given credit for much of it, and there was significant input from a limited number of people, while 55 people were involved with it overall.
They are:
Signers of the Constitution
Abraham Baldwin
Richard Bassett
Gunning Bedford, Jr.
John Blair
William Blount
David Brearly
Jacob Broom
Pierce Butler
Daniel Carroll
George Clymer
Jonathan Dayton
John Dickinson
William Few
Thomas Fitzsimons
Nicholas Gilman
Nathaniel Gorham
Jared Ingersoll
William Jackson, Secretary (attesting)
Daniel of St. Thomas Jenifer
William Samuel Johnson
Rufus King
John Langdon
William Livingston
James Madison
James McHenry
Thomas Mifflin
Gouverneur Morris
Robert Morris
William Paterson
Charles Pinckney
Charles Cotesworth Pinckney
George Read
John Rutledge
Roger Sherman
Richard Dobbs Spaight
George Washington (president of the Convention)
Hugh Williamson
James Wilson
Delegates who left the Convention without signing
William Richardson Davie
Oliver Ellsworth
William Houston
William Houstoun
John Lansing, Jr.
Alexander Martin
Luther Martin
James McClurg
John Francis Mercer
William Pierce
Caleb Strong
George Wythe
Robert Yates
Convention delegates who refused to sign
Elbridge Gerry
George Mason
Edmund Randolph
The founding fathers.
Article 5.
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constituion
Preamble
James Madison
the constituion
The Politics and government of Rome
Treason
the articles of confederation
James Madison is the Father of the Constitution.
Preamble Articles Amendments
i think it was written in Virginia