The extensive work of the Italian artist Giuseppe Trono (Turin, 1739 - Lisbon, 1810) as leading portrait painter at the Portuguese court at the end of the Eighteenth century plays a considerable role in the construction of the image of the royal family and its dissemination by printings and miniatures. Trono subjects also included the Portuguese art-loving élite, where he became fashionable and found commissions of portrait paintings and miniatures. The main altarpiece of the chapel at Bemposta royal palace, displaying an impressive ensemble of portraits of the royal family and the folk of Lisbon, is an extraordinary and unique case in the Portuguese eighteenth century art, which complex iconography shows the politics of the queen Maria I, leaded by the devotion to the Holy Heart of Jesus.