When Fra Angelico and his assistants went to the Vatican to decorate the chapel of Pope Nicholas, the artist was again confronted with the need to please the very wealthiest of clients. In consequence, walking into the small chapel is like stepping into a jewel box. The walls are decked with the brilliance of colour and gold that one sees in the most lavish creations of the Gothic painter Simone Martini at the Lower Church of St Francis of Assisi, a hundred years earlier. Yet Fra Angelico has succeeded in creating designs which continue to reveal his own preoccupation with humanity, with humility and with piety. The figures, in their lavish gilded robes, have the sweetness and gentleness for which his works are famous. According to Vasari: