The stream bed of the Ljubljanica between Vrhnika and Ljubljana belongs among the most important and most endangered archaeological sites in Slovenia due to the number, quality and scientific importance of the finds there. From their sources at Močilnik and Retovje to the watershed of the Ljubljanica and the Grubar Canal at Špica in Ljubljana the river bed of the Ljubljanica and the Mala Ljubljanica with their banks have been declared cultural monuments of national importance. Belonging to the cultural monument is also a part of the Ljubije River from Vrhnika to the confluence with the Ljubljanica and the area between Kamin near Bevke and the fallow Livada at Podpeč.
More than 8000 objects from various time periods have been so far discovered in beds of the Ljubljanica and its tributaries and at Verd a unique Roman barge from the 1st century is still trapped in the right bank of the river.
 
The exhibition will show a film of the archaeological research of the Roman barge and the establishment of the national depository for waterlogged wood in 2012.
 
On 10 April, 2014 at 6 p.m. the City Museum will host Dr. Andrej Gaspari, PhD, an expert with years of experience in the field of underwater research in Slovenia. He will give a lecture on what the Ljubljanica is still hiding and how underwater archaeological research helped with our understanding of the colonisation of the Ljubljana basin and its usage throughout prehistory.