| A | B |
| Constantine | moved Capitol of Roman Empire |
| Byzantine Empire | Hagia Sophia, Cyrillic Alphabet |
| Justinian's Code | codified laws created by Byz Emper. |
| Muhammad | began Islam-wrote the Koran |
| Gupta Empire | zero, earth is round, Hinduism |
| Tang Dynasty | used civil service exam, Silk Road |
| Golden Age | empire reaches its height |
| feudalism | medieval political system |
| manoralism | Medieval economic system |
| chivalry | code of behavior |
| Crusades | goal to regain Holy Land from Muslims |
| Charlemagne | Holy Roman Emperor |
| fief | land granted to vassel |
| trebuchet | giant slingshot |
| clergy | religious officials |
| caliph | political/religious leader in Muslim gov't |
| Algebra | Muslim mathematical invention |
| autocratic government | strong single ruler with complete authority |
| schism | split |
| Eastern Orthodox | religion of Byzantine Empire |