When was the Lincoln Memorial built?
1922
1926
1913
1926
1939
1921
1913
1922
1926
1927
1939
1932
1921
1913
1923
1922
1926
1927
1939
1932
1915
1924
1921
1913
1923
1922
1926
1927
1939
1932
1915
1924
1921
1913
1923
1922
1926
1927
1939
1932
1915
1924
1921
1913
1923
1922
1926
1927
1939
1932
1915
1924
1921
1913
1923
1922
1926
1931
1927
1939
1932
1915
1921
1913
1923
1922
1924
1926
1931
1927
1939
1932
1921
1913
1907
1923
1922
1915
1926
1927
1939
1932
1909
1924
1921
1895
1913
1922
1926
1907
1931
1927
1923
1939
1904
1921
1860
1913
1922
1932
1915
1936
1909
1924
1908
1926
1939
1921
1860
1895
1913
1907
1905
1931
1927
1923
1936
1926
1935
1939
1904
1922
1932
1902
1915
1936
1924
1921
1860
1913
1935
1937
1909
1908
1926
1912
1895
1907
1905
1931
1927
1936
1935
1937
1913
1923
1939
1904
1922
1932
1903
1902
1936
1926
1935
1914
1937
1915
1909
1924
1921
1908
1912
1895
1913
1931
1936
1926
1935
1914
1937
1907
1938
1905
1927
1923
1939
1883
1904
1922
1936
1935
1914
1937
1932
1903
1938
1902
1915
1909
1924
1921
1908
1926
1912
1916
1936
1935
1889
1895
1914