A wood library is called a xylarium. The official term xylarium comes from xylem which stems from
classical Greek for wood xylon. It is a curated collection of wood samples from around the world. BRE has a xylarium of some 30,000 samples from what would have been former colonies in the 1920s onwards. The facility is used as an educational resource, a reminder of the switch to sustainable plantation grown timber in the 20th Century and also to identify wood species as required by the EU Timber Regulations.