brought about many inventions, such as windmills, compasses, gunpowder and clocks. Figure 1This trade between East and West caused prosperity among the people. Child states in his book that the merchants made "a lot of money" out of the trade with the Muslim people. After the Crusades had terminated, these merchants were able to prosper from trade between Europe and the Middle East. Outlined in Figure 1 are some trade routes utilized after the Crusades. During the Crusades, the Muslims used weaponry that the Franks were not familiar with. The battles during the Crusades led to the spread of siege engines, such as the mangonel, and the Franks learned how to employ fire as a "missile". The Franks also learned new methods of creating fortifications. The use of armorial bearings may have originated in the Orient, and it is hypothesized that the Europeans learned many new ideas from looking at Arab armor (Encyclopdia Britannica, 1993). European soldiers learned to protect themselves from the heat by imitating Muslim soldiers. The troops covered their heads and shoulders, and they wore light, loose clothing over their armor (MacDonald, 1993). This sharing of military machinery brought about positive effects for the people involved. In Europe and the Middle East, scholarly developments came along with the trade and military developments. After the Crusades, the use of northern European pointed arches became popular with Muslim architects (MacDonald, 1993). Muslim doctors still retained some of the Greek's knowledge of human anatomy; much of the information had been lost to the Europeans (Child, 1994). Many twelfth century European scientists voyaged to Arabian countries to study different methods and new ideas. Leonardo Fibonnaci, the first Christian algebraist, traveled to Syria and to Egypt to study with mathematicians there. Also, studies of language were initiated by many missionaries. In 1311, Raimon Lull, a missionary in the Orient, intr...
