When was the Washington Monument built?
1848
1884
1885
1884
1885
1907
1884
1885
1907
1884
1885
1907
1884
1885
1883
1907
1884
1885
1883
1907
1884
1885
1883
1907
1884
1885
1915
1883
1907
1884
1903
1885
1915
1909
1883
1907
1913
1884
1902
1903
1885
1915
1909
1883
1907
1913
1884
1931
1902
1903
1885
1915
1909
1883
1907
1913
1884
1931
1902
1903
1885
1915
1909
1883
1907
1913
1884
1931
1902
1903
1885
1915
1909
1883
1904
1907
1913
1884
1902
1903
1885
1915
1909
1883
1931
1907
1913
1884
1904
1902
1903
1885
1915
1909
1883
1907
1913
1884
1931
1904
1903
1885
1915
1909
1883
1912
1907
1913
1901
1884
1902
1903
1924
1885
1915
1909
1883
1901
1931
1887
1907
1884
1912
1904
1913
1901
1924
1885
1915
1883
1907
1902
1903
1908
1884
1909
1901
1931
1887
1885
1915
1883
1912
1904
1907
1913
1901
1884
1924
1885.
1902
1903
1908
1885
1915
1909
1883
1901
1931
1887
1907
1912
1904
1885.
1913
1903
1901
1924
1883
1907
1902
1908
1915
1909
1901
1886
1931
1887
1885.
1883
1912
1904
1885,
1913
1903
1901
1924
1902
1908
1885.
1915
1909
1883
1901
1886
1931
1887
1912
1904
1913
1903