Across
1
Metal that replaced bronze in tools
4
Government by the people
5
Person who travels to discover new lands
7
Object made by humans from the past
8
Alloy of copper and tin used in early tools
9
Fortified medieval residence
10
Union formed for mutual benefit
Down
2
Advanced stage of human society
3
Legislative body in ancient Rome
6
Medieval religious military campaign
11
Legislative assembly of a country