Harvard has discovered an extremely valuable version of the Magna Carta, issued in 1300 by King Edward I of Great Britain, in its collection

<p>For decades, Harvard thought it owned a cheap copy of the Magna Carta, a stained and faded document bought for less than $30. But two researchers have concluded they have something far more valuable - a rare 1300 version issued by Britain's King Edward I. The original Magna Carta, drawn up in 1215, laid the foundations for global constitutions. Until now, only six copies of the 1300 version were thought to exist.