Aperson who rules in place of a ruler who is either too young or too ill to govern saint justinian theodora regent mosaic

Answer is Regent

TRUST ME OR  ELSE ULL REGRET IT

d: their own individual powers within the new goverment

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.