May 12 English barons serve ultimatum on king John without Country June 15 King John signs Magna Carta at Runnymede, England July 23 Frederik II crowns himself Roman Catholic king July 25 Frederik II (20) crowned king of German August 24 Pope Innocent III declares Magna Carta invalid November 11 4th Lateran Council (12th ecumenical council) opens in Rome November 30 Pope Innocent III closes 4th council of Lateranen
