York+Prep--Cultural+Diffusion+in+the+Medieval+World

__**Trebuchets:**__ [|Diagram: Traction & Fixed Counterweight Trebuchets] [|A Battery of Hsuan Feng (c. 1044)] [|Byzantine Trebuchet] [|ProjectTrebuchet Betsy Congdon Stanford U.ppt]
 * __Cultural Diffusion in the Medieval World __**

__**Maps:**__ [|Byzantium & Islam 500 to 1400 C.E.] [|Abbasid Empire & Tang China 800s C.E.]

__**Documents:**__ [|Religion and Learning Of Two Medieval Minds York Prep 1March2012.docx]