Among his rivals in architecture were, above all, Francesco Borromini and Pietro da Cortona. Early in their careers they had all worked at the same time at the Palazzo Barberini, initially under Carlo Maderno and, following his death, under Bernini. Later on, however, they were in competition for commissions, and fierce rivalries developed, particularly between Bernini and Borromini. In sculpture, Bernini competed with Alessandro Algardi and Francois Duquesnoy, but they both died decades earlier than Bernini (respectively in 1654 and 1643), leaving Bernini effectively with no sculptor of his same exalted status in Rome. Francesco Mochi can also be included among Bernini's significant rivals, though he was not as accomplished in his art as Bernini, Algardi or Duquesnoy.