Federal Hill observatory tower
circa 1900
circa 1900
1953-09
1861-07-20
1949-04
1850-01-15
1914
1904
1904-06-14
1904-06-14
circa 1860
1624
1895
circa 1895
1939
1913
1889-11
1980-03-08
circa 1955-1977
1919
circa 1870-1890
circa 1873
1870
1905-04-19
circa 1954-02
circa 1860
1854
1867
circa 1925
circa 1925
1833-10-19
circa 1925
1883-09
1860
1912
circa 1814
1804
early 20th century
1853
1994-07-04
circa 1900
1992-1993
circa 1988
circa 1948
circa 1948
circa 1949
1976-04-06
circa 1890s
1895-04
1977-08-04
1976-06-25
1896
1841-10-26
1969-11
1928
circa 1921
circa 1830
1871
1925
circa 1900
circa 1890