Bust of Isabella of Aragon or Ideal Portrait of Laura is a marble sculpture by Francesco Laurana, now in the Kunsthistorisches Museum in Vienna. It is the only one of the artist's sculptures still to retain the coloured wax he applied to it. Its idealisation draws on the works of Piero della Francesca, which Laurana may have seen in Urbino, and leads some to identify it as an ideal portrait of Petrarch's Laura.
It is generally dated to 1487-1488 and held to show Isabella of Aragon, probably meaning it was commissioned to mark her marriage to Gian Galeazzo Maria Sforza in Naples in 1488. Some theorise that instead it shows Ippolita Maria Sforza and dates to 1475, when the sculptor was in Naples, whilst others argue it shows Isabella's mother Ippolita Maria Sforza. The museum currently calls it an "ideal portrait of Laura".
- (in German) "Catalogue entry".
- (in Italian) David Alberto Murolo, Storie della Vrana: destini incrociati tra arte e guerra: Luciano e Francesco Laurana, Giovanni Vrana, Yusuf Maskovic, REMEL, Ancona, 2016
- (in Italian) "WGA entry".
- Stefano Zuffi, Grande atlante del Rinascimento, Electa, Milano 2007. ISBN 978-88-370-4898-3