The baths of Decius were built on instigation of Emperor Decius, whose reign lasted only three years. Overlooking the Aventine, they were remarkable baths in an environment of temples and great patrician mansions. Even if these baths did not have the scope of those built at the same time, they offered the classical division between a main building with a frigidarium and wings that could house gymnasiums and libraries. The baths were built within a wall as all great baths of Rome.

In the west corner of the Baths, with an impressive view over the Tiber, stood Trajan’s private House .

The Baths seen on the front side. This picture underlines the complex urbanization of the Aventine and the privileged site of the Decius’ Baths.