Across
1
Payment made to show submission
6
Exchange of goods between peoples
7
Metal that replaced bronze in tools
8
Ancient Egyptian picture writing
9
Roman arena fighter
10
Object made by humans from the past
11
Period of one hundred years
12
Practice of establishing foreign colonies
13
Formal agreement between nations
14
Deadly epidemic disease
15
Large territory under one ruler
Down
2
Sudden overthrow of a government
3
Alloy of copper and tin used in early tools
4
Handwritten historical document
5
Person who travels to discover new lands