Across
1
Ancient Egyptian stone monument
4
Metal that replaced bronze in tools
5
Alloy of copper and tin used in early tools
6
Person who travels to discover new lands
9
Formal agreement between nations
10
Fortified medieval residence
12
Practice of establishing foreign colonies
13
Large territory under one ruler
Down
2
Exchange of goods between peoples
3
Fundamental law of a nation
7
Government by the people
8
Ancient empire that conquered much of Europe
11
Uprising against authority