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

Call or email us for more information about dating your building.

Oxford Tree-Ring Laboratory
Michael Worthington and
Jane Seiter, PhD
25 E. Montgomery St.
Baltimore, MD 21230


Michael Worthington sampling a timber Drayton Hall SC

This is how we sample your building,  READ MORE

Dendrochronology Results

The Laboratory's staff have been involved in the scientific dating of over two hundred historic buildings both in the USA and UK. Detailed listings for all of them can be found here, 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