When did construction begin on the Gateway Arch?
1963
1939
1939
1895
1913
1887
1898
1904
1896
1939
1890
1895
1913
1927
1887
1905
1898
1904
1939
1890
1895
1913
1896
1889
1927
1915
1887
1888
1939
1895
1913
1905
1926
1908
1898
1904
1890
1896
1889
1902
1927
1939
1895
1913
1915
1887
1888
1903
1905
1926
1908
1923
1898
1939
1960
1970
1907
1904
1896
1889
1902
1927
1897
1890
1883
1965
1967
1963
1960
1939
1970
1894
1895
1924
1913
1909
1893
1915
1968
1964
1962
1961
1965
1967
1969
1963
1960
1922
1887
1888
1903
1905
1926
1970
1908
1966
1923
1898
1886
1968
1964
1962
1980
1961
1965
1907
1899
1982
1904
1912
1967
1969
1963
1960
1896
1932
1889
1902
1927
1890
1970
1966
1971
1968
1964
1973
1962
1885
1897
1939
1883
1980
1961
1975
1965
1894
1895
1982
1924
1967
1913
1969
1963
1960
1893
1979
1984
1970
1966
1986
1971
1985
1968
1909
1964
1973
1962
1922
1915
1887
1888
1903
1980
1905
1926
1908
1961
1975
1965
1982
1967
1969
1963
1960
1970s
1976
1979
1984
1970
1966
1937
1986
1971
1990
1985
1974
1968
1923
1930
1898
1987
1886
1958
1907
1899
1904
1912
1896
1932
1964
1973