A flat-bottomed vessel was found in Cothen in 1995 in the bed of the Oude Rijn. Parts of the shelf, curved wood and a flat board have been found.
The dimensions of the barge were approximately 20 by 2.5 to 4 by 1.25 meters. Dendrochronological research gives a cutting date after around 826 AD.
- Brouwers, W./E. Jansma/M. Manders: article on Dutch early medieval ships (Dutch).