Across
1
Advanced stage of human society
6
Fortified medieval residence
8
Long and distinct period of history
Down
2
Military blockade of a fortified place
3
Union formed for mutual benefit
4
Alloy of copper and tin used in early tools
5
Metal that replaced bronze in tools
7
Government by the people
9
Object made by humans from the past
10
Medieval religious military campaign
11
Exchange of goods between peoples