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An official website of the State of Maryland.

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Maryland Historical Trust

Identify & Document

Maryland Historic Trust (MHT) provides guidance for archaeological and architectural survey, as well as the National Register of Historic Places, and maintains the Maryland Inventory of Historic Properties. Explore our resources.

Geographic Information System (GIS) data

Learn about the Geographic Information System (GIS) data available through Maryland Historical Trust and how to request historic and cultural property data for your research.