Labor atory

The Oxford Tree-Ring Laboratory was formed in 2010 by Michael Worthington and Jane Seiter to provide cutting-edge dendrochronological services to archaeologists, architectural historians, art historians, cultural resource managers, and private house owners. READ MORE

Contact Information

Oxford Tree-Ring Laboratory

Michael Worthington
Jane Seiter, Ph.D

michael@dendrochronology.com jane@dendrochronology.com


25 E Montgomery St.
Baltimore, MD 21230

410 929 1520


Michael Worthington sampling a timber Drayton Hall SC

This is how we sample your building,  READ MORE

Basic Dendrochronology

The Laboratory's staff have been involved in scientific dating of over two hundred historic building both in the USA and UK. Detailed listing of all of them can be found READ MORE


Oldest building in  NC, Edenton

After two years of investigation of what was a planned rental property, the oldest dated house in North Carolina has been identified in Edenton.
Preservationists with the N.C. Historic Preservation Office, architectural historians with the Architectural Research Department at Colonial Williamsburg and local historians participated in the research. READ MORE

Book Shop

Front cover of the Chesapeake House book

Must Have Books!
For more than thirty years, the architectural research department at Colonial Williamsburg  READ MORE