The Palace of Galerius (also called Galerius’s Palace) is an ancient Roman imperial residence located in Thessaloniki, Greece. Built in the early 4th century AD by the Roman Emperor Galerius, it was one of the grandest palaces of the late Roman Empire.

The palace complex was extensive and lavishly decorated, featuring multiple rooms, courtyards, and administrative spaces befitting an imperial residence. Though much of it lies in ruins today, archaeological excavations have revealed mosaics, marble floors, and architectural remains that showcase the sophistication and wealth of Roman imperial architecture.

The palace is situated near other significant monuments in Thessaloniki, including the Rotunda and the Arch of Galerius, forming an important archaeological precinct that dates to the reign of Galerius (305-311 AD). This area reflects Thessaloniki’s prominence as a major city in the Roman Empire during the late antique period.

Today, the remains of the palace are open to visitors and provide valuable insights into Roman imperial life and architectural practices. The site is part of Thessaloniki’s UNESCO World Heritage designation, recognizing its historical and cultural significance.