In brief
The Koguryo property in China includes city remains and tombs. UNESCO notes ingenious ceilings in some tombs, covering wide spaces beneath heavy mounds.
Useful to know
The Koguryo property in China includes city remains and tombs. UNESCO notes ingenious ceilings in some tombs, covering wide spaces beneath heavy mounds. [1]
This directs attention to sections rather than plans alone. Trace how overhead weight is supported and the chamber formed, without treating every ancient roof as the same construction.
Sources
For further detail and to check the information: