sentences:  After Curti died in 1632, Colonna began a long collaboration with the skilled "quadratura" painter Agostino Mitelli until 1660.Together they contributed to the decorations of the Palazzo Spada in Rome, and then painted in the Pitti Palace in Florence, including a large fresco of the 'Fame of the Medici crowned by Glory'.They became the pre-eminent "quadratura" fresco painters of northern Italy with Colonna principally executing the figurative elements and Mitelli, the "quadratura" or illusionistic architectural frameworks