Apparently not only the Romans, in ancient times, They could be said to be masters of sewage and sanitation systems.
A recent archaeological discovery a testament to how well east of the world, from this point of view, if they cavassero pretty well.
Just over a month ago, a team of scholars he brought to light in China remains very well preserved three bathrooms very luxurious, certainly belonging to an imperial palace.
The dating of the structures is about 2300 years.
They hit the modernity of floor tiles used for the coating and, mostly, the presence of a sophisticated plant for the outflow of wastewater (Photo gives: google.it).