The study was performed to find construction dates of four important historical buildings in Tokat and Amasya-Merzifon by using dendrochronological methods. As a result, the construction dates of the buildings were determined as 1425-1426 for Bedesten, 1485-1486 for Gulbahar Hatun Külliye and 1488- 1489 for Deveciler Han in Tokat, and 1672-1673 for Bedesten in Amasya-Merzifon.