Aldus New Roman, a Renaissance antiqua (Venetian types, Humanist serif, Old style antiqua).
Triple pun here:
#1 Aldine Roman type;
#2 Since it is equalized, modernized version — the parallel to the Times New Roman;
#3 He called himself Aldus Pius Manutius Romanus — he was a new Roman during his Renaissance times.
Font Family: Aldus New Roman Regular