Virtual Museum of Canada
Jardin botanique de Montréal 
Centre for Forest Research

Dendrochronology

Good Answer

In fact, dendroarchaeology is a science that uses crossdating to compare tree growth rings in order to date very old constructions or products. An abbey from the Middle Ages or a possible Stradivarius violin could be crossdated, for example.

Score
Growth rings

© Jardin botanique de Montréal (Lise Servant)