The Roman water organ
A third-century instrument worked by water pressure, among the most complete found anywhere — with a working replica you can hear.
Vadaro — Public domain · GFreihalter — CC BY-SA 3.0 · Lóránd Péter — CC BY-SA 3.0 · Envagyokabela — CC BY-SA 4.0
A Roman city, capital of the province of Lower Pannonia, home to around forty thousand people at its height. It lies in the Óbuda district north of Budapest and is the largest Roman site in Hungary — predating Buda and Pest by a thousand years.
If Roman history interests you, yes — there is no comparable site in Hungary. On a two- or three-day trip, leave it: Budapest has closer and more distinctive things. This is for a fourth or fifth visit, not a first.
Yes in good weather: open space to walk among the ruins, and seasonal activities at times. But it is exposed with no shade, and unworkable in rain or severe heat.
Troja Palace and Budapest Zoo lie in the same northern direction, and Óbuda also holds the remains of the Roman amphitheatre. They combine into a single northern day.
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A thousand years before Buda and Pest there was a Roman city here called Aquincum, capital of the province of Lower Pannonia and home to around forty thousand people. Its remains lie today in the Óbuda district north of the city, and it is the largest Roman archaeological site in Hungary. The site is oddly divided: a modern flyover passes over part of it, so you walk among the foundations of Roman streets, houses and baths while traffic crosses overhead. The civilian town is displayed in the open air — a legible street grid, shop foundations, underfloor heating systems, public baths and a small temple of Mithras. The covered museum displays the finds: mosaics, tools, inscriptions and sculpture. Its most famous object is a Roman water organ from the third century — an instrument worked by water pressure, among the most complete of its kind found anywhere, and a working replica has been built whose sound can be heard. The site is well outside the centre — about half an hour on the HÉV suburban railway. Go if Roman history interests you, or if you are with children who enjoy walking among ruins; avoid it in rain, since most of it is open to the sky.
A third-century instrument worked by water pressure, among the most complete found anywhere — with a working replica you can hear.
Legible foundations of streets, shops and houses — you walk the plan of a real Roman town, not a model.
Hypocaust remains: hot-air channels beneath the floors — Roman engineering plainly visible.
Mosaic floors and Latin inscriptions kept in the covered museum — the part that works on a wet day.
Szentendrei út 135, Óbuda, Budapest 1031