Across
1
Government by the people
2
Fortified medieval residence
6
Person owned as property
7
Long and distinct period of history
8
Medieval land-for-service system
9
Belonging to a very old period
10
Metal that replaced bronze in tools
11
Person who travels to discover new lands
12
Payment made to show submission
Down
1
Period of ten years
2
Advanced stage of human society
3
Ancient empire that conquered much of Europe
4
Alloy of copper and tin used in early tools
5
Ancient Mesoamerican civilization
13
Legislative assembly of a country