Colonna alone seemed born to associate with him, as he did after the death of his favourite Curti. An intimacy ensued, which was like the second act of Angiol Michele's life; an intimacy which, strengthened by mutual esteem and interest, and cherished by habit and kind offices, continued during twenty-four years, until terminated by the death of Mitelli. These two friends added greatly to the excellent models of the art at Bologna; and among their most celebrated labours are the chapel of Rosario, and the hall of the Conti Caprara. Elsewhere, as in the Bentivogli and Pepoli palaces, Agostino produced only specimens of architecture; and in others we see his pictures of perspective conducted _a guazzo_, with figures by Gioseffo, his son, a disciple of Torre, who engraved even better than he painted. In their commissions beyond Bologna, Mitelli and Colonna were always invited together; as to Parma, to Modena, to Florence, by their respective rulers; by the Marchesi Balbi to Genoa, and by Cardinal Spada to Rome, whose ample hall they enlarged, as it were, and dignified by means of feigned colonnades, artful recesses, and magnificent steps, where numbers of figures, arrayed in varied and novel drapery, were seen ascending and descending. Called subsequently to the court of Philip IV., they decorated three chambers and a magnificent hall in Madrid, where Colonna, too, produced his so highly extolled Fable of Pandora. They here sojourned for the space of two years, the last of Mitelli's life, who died much regretted by the whole court, and by the Spanish artists, at whose head stood Diego Velasquez.