Around Aug 1153 King Henry "Curtmantle" II of England (age 20) and King Stephen I England (age 59) agreed the Treaty of Wallingford aka Winchester aka Westminster by which King Henry "Curtmantle" II of England (age 20) would inherit the throne on the death of King Stephen I England (age 59). The Treaty was ratified by Archbishop Theobald of Bec (age 63) at Westminster [Map] in Christmas 1153.