Another interpretation of the Birth of Venus is provided by art historian and author, Charles R. Mack.[42] This interpretation takes much that is generally agreed, but Mack goes on to explain the painting as an allegory extolling the virtues of Lorenzo de' Medici.[43] This has not been adopted by Renaissance art historians in general,[44] and it remains problematic, since it depends on the painting being commissioned by the Medici, yet the work is not documented in Medici hands until well into the following century.