For 10 points, name this king executed in 1649 at the end of the English Civil War, resulting in the formation of the English Commonwealth.
This king controversially supported the author of A New Gag for an Old Goose, Richard Montagu. He made embarrassing concessions to the Scots in the Treaty of Ripon. This ruler appointed as Archbishop of Canterbury the unpopular William Laud. In order to raise money after the Bishops' Wars, this man was forced to assemble a parliament under the control of opponent John Pym. A key loss for this king's supporters in the north was at Marston Moor. This king's fate was sealed when Pride's Purge resulted in the Rump Parliament, which pushed for his execution. For 10 points, name this king executed in 1649 at the end of the English Civil War, resulting in the formation of the English Commonwealth.
This king controversially supported the author of A New Gag for an Old Goose, Richard Montagu.
{Charles I}