In the context of this artwork, explain the Chapel of the Immaculate Conception of the History.
The Chapel of the Immaculate Conception was founded prior to 1335 by Beatrice d'Este, wife of Gian Galeazzo Visconti, Duke of Milan.  The chapel was attached to the church of S. Francesco Grande, Milan.In 1479 the Confraternity of the Immaculate Conception contracted Francesco Zavattari and Giorgio della Chiesa to decorate the vault of the chapel.  In 1480 the Confraternity of the Immaculate Conception contracted Giacomo del Maino to create a large wooden altarpiece with spaces for paintings and with carvings and decoration, to be placed above the altar of the chapel. Final payment was to be made on August 7, 1482.
Duke of Milan Milan Gian Galeazzo Visconti Beatrice d'Este