Calvert County Maryland (Historic Districts) has 1 places on the National Register of Historic Places.
Prehistoric cultural affiliation(s) include Archaic, Woodland and Et Al. dating back to 8999 BC. Prominent architectural styles found in Calvert Country are .
Patterson's Archeological District
(added 1982 - - #82002808)
Also known as St. Leonard's Plantation;St. Leonard's;Long Point;Patterson'