Diocletian's palace, built at the beginning of the 4th. century, is the best preserved Late Roman palace in the world. The Palace, as all urbanized spaces, had its water supply and sewerage and, as an imperial building, the best one. All the former knowledge and findings of the sewage system, inside and outside of the Palace and new conclusions on project and realisation of this important, detaily planned and built roman infrastructural facilty are gathered in this article.
