So, this is a crossudoku.
It is the same as a sudoku - same rules apply. However, you have been given crossword-like clues for part of the numbers on the grid.
Some of the clues may have multiple answers - so you may need to be solving the "crossnumber" and the "sudoku" part of the puzzle simultaneously to find the correct digit for each cell.
A1-C1 and C9-E9 Then will I swear beauty herself is black, And all they foul that thy complexion lack.
A2-B2, I5-I6, I7-I9 and B6-B8 A perfect square and a perfect cube
A5-G5 A quick and easy approximation of a pie
E3-F3 The answer.
F2-G2 and G4-H4 The number of months in a year
G6-H6, G7-H7, C6-D6 and B9-C9 The sum of two consecutive squares
D4-E4, H1-H2 and I6-I7 There is a lot of silver lining hidden in this grid...
E8-H8 My kingdom is not of this world.
C7-D7 The sum of two consecutive cubes
A4-A7 The devil was hit by a cube
B5-B8 Your ride when you are drunk
I8-I9 The sum of 3 consecutive squares
I3-I4 Some buildings skip this floor
F3-F4 and G2-G3 Between a square and a cube