The Imperial Palace of Maximian in Milan, known in Italian as Palazzo Imperiale di Massimiano, is one of the most evocative Roman archaeological sites in the city. Built around 286 AD when Emperor Maximian made Mediolanum (modern Milan) the capital of the Western Roman Empire, the palace served as the emperor’s main residence and administrative centre.
The remnants of the palace stand on Via Brisa, near the intersection with Corso Magenta, in Milan’s historic core. Hidden behind modern buildings, this archaeological zone preserves walls, pavements, and sections of courtyards that once formed part of a grand imperial complex. 
A nearby tower from the ancient circus survives within the Convent of San Maurizio Maggiore, and one of its towers was later adapted as a bell tower. The Baths of Hercules, also built under Maximian, formed part of the same vast complex.
Interesting fact...
The ruins lay hidden beneath centuries of later buildings until World War II bombings in 1943 accidentally exposed its buried remains. While tragic, these attacks not only revealed the walls and baths of Maximian’s residence but also destroyed the adjacent Palazzo Gorani, erasing one layer of history to uncover a far older one.