Budapest Aquincum Museum is the museum featuring Roman remnants in the city of Budapest (Aquincum was the Roman name of the border town, now found on the Buda side of Budapest).
Besides ancient ruins, mosaics, and tools, Aquincum Museum also throws a big Saturnalia party each Christmas to celebrate Xmas in real Roman style. Saturnalia Festival / ancient Christmas party takes place annually early December.
Aquincum Christmas Opening Hours, 2012