Federal Hill observatory tower
circa 1900
circa 1900
circa 1943
1953-09
1953-09
1976-07-02
1976-04-06
1904
1948-03
1948-03
circa 1910
1897
circa 1880
1977-08-04
1976-08-19
undated
circa 1962-1977
circa 1955-1977
1896
1881
1963-07-04
1963-07-04
circa 1910
circa 1910
circa 1910
circa 1910
circa 1910
circa 1910
circa 1910
1919
circa 1911
1896
1901-07-04
1846-09-12
1912
circa 1925
circa 1925
circa 1925
circa 1835-1840
circa 1930s
circa 1804-1858
circa 1895
1858
circa 1815-1872
1903
1903
1912
circa 1825
1946
1946
circa 1905
1950s
1917-05-14
1917-05-14
1917-05-14
2000
2000
1909-06-14
1985
1876-1877
circa 1852