5th-century Roman Palace

The 5th-century Roman Palace in Polače, on Mljet Island, stands as one of the Adriatic’s most significant Roman-era structures. Located right on the waterfront, the palace’s impressive rectangular footprint is immediately striking—so much so that the main road now passes directly through its center. Flanked by towers at its front corners and separated by a pier, the palace’s remains offer a tangible link to Mljet’s ancient past.

As you explore the site, you’ll notice how the palace anchors a cluster of historical ruins, including a late Antiquity fort and the remnants of an early Christian church. These layers of history reflect Mljet’s long and varied story, from its Illyrian and Greek roots to its Roman heyday and later medieval developments. The palace itself is a testament to the island’s strategic and cultural importance in the Roman era, comparable in significance to Croatia’s more famous Roman landmarks like Diocletian’s Palace in Split.

Wandering through the ruins, visitors can imagine the grandeur of the original structure and enjoy the unique setting where ancient stonework meets the tranquil harbor. The site is open to the public, though there are no formal opening hours or admission fees. For those interested in archaeology, history, or simply a scenic walk, the Roman Palace in Polače is a fascinating highlight of any visit to Mljet Island.