The only hydraulicon existing in the world today from the Roman age was unearthed by Lajos Nagy archaeologist in 1897-1946. South of the Aquincum Museum In Óbuda while the bases of the transformer of the Electric Co. was being digged up the workers found an antique Roman cellar with caved in ceilings. They found broken bronze pipes and the components of an organ under the ruins. They also found bronze tablets which had data saying that the instrument was given as a present to Aquincum's fire-department, which was lead by Gaius Iulius Viatorinus, in 228 AD.