How does the following account enlarge upon the character of Pax Mongolica created by the Mongols by the middle of thirteenth century? "The Fransiscan monk, William of Rubruk, was sent by Louis IX of France on an embassy to the great Khan Mongke's court. He reached Karakorum, the capital of Mongke, in 1254 and came upon a woman from Lorraine (in France) called Paquette, who had been brought form Hungary and was in the service of one of the prince's wives who was a Nestorian Christian. At the court he came across a Parisian goldsmith named Guilliaume Boucher, 'whose brother dwelt on the Grand Pont in Paris'. This man was first employed by queen Sorghaqtani and then by Mogke's younger brother. Rubruk found that at the great court festivals, the Nestorian priests were admitted fist, with their regalia to bless the Grand Khan's cup, and were followed by Muslim clergy, and Budhist and Taoist monks ..."