Aqueduct of Valens: Early 5th century. Part of the Roman water supply system for Istanbul.

渡槽蠹：5世纪初。部分罗马供水系统的伊斯坦布尔。

youdao

Aqueduct of Valens: Early 5th century. Part of the Roman water supply system for Istanbul.

渡槽蠹：5世纪初。部分罗马供水系统的伊斯坦布尔。

youdao