Referenced In

The Travels of Marco Polo
by Marco Polo, da Pisa Rusticiano

"LXX. —Concerning the very Noble City of Saianfu, and how its Capture was effected 158 Notes.—1. and 2. Various Readings. 3. Digression on the Military Engines of the Middle Ages. 4. Mangonels of Cœur de Lion. 5. Difficulties connected with Polo’s Account of this Siege."