The Triumphal Cross and Screen at St. Jacobi Cathedral in Lübeck, Germany, was constructed at the time of the building's construction, in the 15th century AD. Recent dendrochronological research on the building and the cross itself indicate that the artwork was constructed out of wood that had been specifically shipped in. Comparisons of the tree rings exhibited in the wood to other regional reference chronologies allows researchers to identify where the tree grew. Based on the data, this screen from St. Jacobi was made in the late 15th century from planks taken from 200-300 year old trees from the Polish-Baltic forests, probably along established trade routes from Gdansk, Riga, or Konigsberg harbors.
- Tree Rings and Culture, discusses the dendrochronological work completed in Lübeck
- Dendrochonology, a brief description of the science of tree rings
