Complex sentence: Vasari painted the Allegory of the Immaculate Conception for the family chapel and later the frescos of the Palazzo Altoviti in Rome, known as the Triumph of Ceres.
Split into simpler sentences: Vasari painted the Allegory of the Immaculate Conception for the family chapel. Later Vasari also painted the frescos of the Palazzo Altoviti in Rome, known as the Triumph of Ceres.