横向
1
Roman arena fighter
5
Relating to the Middle Ages
6
Long and distinct period of history
7
Person who travels to discover new lands
9
Union formed for mutual benefit
10
Practice of establishing foreign colonies
12
Object made by humans from the past
纵向
2
Succession of rulers from same family
3
Advanced stage of human society
4
Person with no fixed home
8
Deadly epidemic disease
11
Armed entry into another territory
13
Payment made to show submission
14
Alloy of copper and tin used in early tools
15
Fortified medieval residence