In the spring of 2018, archaeological research was carried out on the area where the construction of the Bratislava Zero Bypass and the route of future D4/R7 was taking place near Podunajské Biskupice.

A unique late-Antique period nobleman’s compound, built by a local German emperor in the style of Roman buildings underwent investigation.
Recognition of the significance of the discovery required several months of analysis including not only the uncovered foundations but mainly the findings. Among these are many Roman coins depicting the emperors Constantine the Great and Valentinian and luxury ceramics imported from the province of Pannonia.
A surprising discovery was the grave of a woman from the Migration era (5th -6th AD) containing a deformed skull.
The research was conducted under the auspices of the non-state scientific organization Via Magna, led by archaeologist Milan Horňák.