Dendrochronological studies of wood from medieval Pskov were initiated by N.B. Chernykh about forty years ago. As a result of these works, the fi rst dendrochronological scale for Pskov was developed. This scale fi rst covered the period from 788 to 1459, then was extended until 1747. At the present, the wood sample from Pskov comprises 3336 specimens including 1990 dated pieces. Slices of wood were collected from 40 excavations located in various parts of the town. Every fi eld season yields new specimens, mostly from layers dating from the 15th–19th cent. New samples make it possible to extend the limits of the scale and to enhance its reliability especially with regard to the 17th–18th-cent.