The NIHK and the Museum of Archeology at Schloss Gottorf (Schleswig) can look back on a long history of intensive and successful collaboration. This goes back to the 1960s, when it was decided to work closely together to research roman Iron age and early medieval settlements in the coastal areas of Schleswig-Holstein and Lower Saxony. As a result, archaeobotanical research was carried out at sites such as Elisenhof or Haithabu in Wilhelmshaven, while the animal bones recovered during excavations in the Feddersen Wierde area were analyzed archaeozoologically by experts of the museum in Schleswig. This cooperation has now been renewed and expanded in order to make the best possible use of the expertise and equipment available in both houses. It was agreed that the restoration workshop at Schloss Gottorf, under the direction of Dr. J. Schultze, will in future also carry out the conservation of wet wood finds from the NIhK excavations, while the NIhK textile archaeologist C. Peek, M.A., will carry out analyses on organic finds from Schleswig-Holstein. She also advises the Schleswig State Museum on the conservation and exhibition of such objects.