In 1757 Mengs was commissioned to paint the ceiling of the church of Sant’Eusebio, Rome. It would be his first monumental work in the city and his first fresco. This, his final sketch, is very close to the finished work, since damaged. Putti hold the symbols of the saint: a chalice and a heavy chain, the latter referring to his imprisonment and death in captivity. Mengs' art was both novel and conventional, adapting 17th-century models to a new sensibility favouring restraint. His palette is colder than normal, the composition lucid, and the iconography simple.