REMOVE

1. caves
2. 7th century

WHAT

1. architecture (object genr … (2)
2. sculpture (visual works) (2)

WHERE

1. China (nation) (2)
2. Luoyang, China (2)

WHO

1. unknown Northern Wei (Chi … (2)

WHEN

1. 6th century (2)
2. 8th century (2)
3. Northern Wei (2)