When was construction on the Gateway Arch completed?
1965
1931
1931
1931
1931
1931
1931
1931
21st century
1931
1931
21st century
1931
21st century
1931
21st century
1931
1964
20th century
1931
1964
1939
1969
20th century
1907
1964
1931
1965
1969
1939
1964
1965
1962
20th century
1904
1907
1931
1969
1932
1939
1964
1965
1962
1963
1904
1969
1907
1931
1926
1964
1903
1965
1962
1932
1931.
1939
1963
1969
20th century
1971
1921
1904
1907
1964
1931
1965
1962
1926
1960
1903
1963
20-Jun-17
1932
1922
20-Mar-31
1969
1927
20-Mar-65
21st Century
1939
1931.
1971
20th century.
1964
1965
1921
1962
20th century
1960
1904
1907
1931
1963
1926
1969
1903
1971
1932
1922
1927
1939
1964
1965
1962
20-Jun-17
1960
21st Century
December 31, 1931
1931-1984
20th century.
1963
1921
1904
1969
1907
1931.
1902
1931
1971
1926
1931-1931
1970
1964
1903
1965
1962
1932
20th century
1922
1960
20-Mar-65
1931-1932
1939
1963
20-Jun-19
1969
1971
21st Century
1961
1904
1927
1907
20th century.
1970
1964
1931
1965
1962
1926
1960
1903
August 30, 1965
1963
1921
1932
1959
1969
20th century
December 31, 1931
1939
1931.
1902
1971
1961
August 30, 1931
1970
1964
1965
20-Jun-19
1962
1931-1984
1922
1960
1904
1907
1931-1972
1931-1942
1931-1990
21st Century
1963
1926
1959
1969
1931-1943
1971
1931-1931
1921
30 June 1931
1931-1974
1932
1961
1931-1938
1927
1970
1939
1964
December 31, 1965
1965
1962
1931-1932
1931.