REMOVE

1. city walls

WHAT

1. architecture (object genr … (4)
2. city gates (1)

WHERE

1. China (nation) (3)
2. Xi'an, China (3)
3. Israel (nation) (1)
4. Jerusalem, Israel (1)

WHO

1. unknown Ming (3)

WHEN

1. 14th century (3)
2. 15th century (3)
3. 16th century (3)
4. Ming (3)
5. Ottoman (1)