Across
1
Object made by humans from the past
6
Formal agreement between nations
7
Armored warrior of medieval times
9
Alloy of copper and tin used in early tools
11
Ancient empire that conquered much of Europe
Down
2
Ancient Egyptian ruler
3
Fortified medieval residence
4
Long and distinct period of history
5
Sudden overthrow of a government
8
Advanced stage of human society
10
Government elected by the people
12
Succession of rulers from same family