Welcome to Medusa, the Maryland Historical Trust’s online database of architectural and archeological sites
and standing structures. The Maryland Historical Trust, home of the State Historic Preservation Office (SHPO), is the
official repository for the Maryland Inventory of Historic Properties (MIHP), which as of early 2015 includes some
40,000 architectural resources and 13,000 archeological sites. The database includes records for the National Register
of Historic Places (NRHP) properties in Maryland, determinations of eligibility (DOE) records, and records for
properties in the Maryland Historic Preservation Easement program.
Access to paper records is free and open to the public by appointment at
the MHT Library
in Crownsville, MD (access to archeological data is restricted to qualified individuals).
Medusa provides an online access point for users, both at the MHT Library and off-site. The
database can be searched in a variety of ways, both map- and text-based.
Web access to all of the architectural data is open to the public. Access to archeological site locations and detailed
site information is restricted and password protected and will be granted to qualified individuals on a
need to know basis. Click on the Register for an Account link to submit your qualifications and to receive
Medusa is an evolving system, and both maps and database records are updated and added constantly. Users are
encouraged to notify us about additions or corrections that may be needed by clicking the
Submit Feedback link. Please include references or other documentation for changes or additions. New sites will be
added when received.
A major upgrade to Medusa, incorporating a map-based searchable interface, is planned for late 2015. Check back for
The name is not an acronym; it’s merely a code name used for years for Maryland’s in-house state architectural
and archeological database.
Medusa includes: (1) the Maryland Inventory of Historic Properties; (2) the state archeological survey; (3) National Register
properties in Maryland; (4) determination of eligibility (DOE) records; and (5) properties in the Maryland Historic
Preservation Easement program.
The different background colors on the forms and search results pages (red for MIHP, blue for archeology, purple for
National Register, green for DOE, and yellow for Easements) correspond to the colors of the resources in the state's
GIS database. These colors are intended to make it easier to navigate the individual form types in the system.
Unfortunately, at present the GIS map database can only be viewed at the MHT Library in Crownsville, MD. As noted, we
are working on a major upgrade that will provide interactive maps along with the Medusa database remotely as well as
in the MHT Library.
You only need to log in to view archeological site information, as access to that information (especially site location)
is restricted and granted to qualified individuals on a need to know basis. You can request an account by clicking Log In
in the upper right of the screen, and then choosing Request New Account.
The Maryland Historical Trust Library is open to historic preservation consultants on Tuesdays, Wednesdays, and
Thursdays by appointment only. For further information or to schedule an appointment, contact Lara Westwood
by email at firstname.lastname@example.org
or by phone at 410-697-9546. Details about visiting the Library are also available at the
MHT Visting the Maryland
Historical Trust Library as a Historic Preservation Consultant" page.
As noted above, all material relating to Maryland's archeological sites is accessible only to qualified researchers
with a valid Medusa account. If you need access to this material, and you do not already have a valid Medusa
account, please be sure to allow sufficient time for your account request to be processed.
Copyright © 2014-15, Maryland Historical Trust
About Medusa |
User's Guide |
Produced with the generous support of Improving Public Access to Maryland's Inventory of Historic Properties,
a Preserve America grant
administered by the National Park Service, Department of Interior.