Prof. Hanns Hubert Leuschner (University of Göttingen University), Dr Andreas Bauerochse (Lower Saxony State Service for Cultural Heritage) and Jan Eckstein visited our Group on 8-13 of May 2007. During the visit, the current state and perspectives of dendrochronological investigations on subfossil wood were discussed. Field trips to bogs in Žuvintas, Čepkeliai Reserves and Palios peat-bog were accomplished.