Engaged cassetta frame on a polyptych panel by Niccolò di Buonaccorso

This exquisite "Coronation of the Virgin" from 1380, painted by the Sienese master Niccolò di Buonaccorso, showcases his refined miniaturist technique. Currently held in a private collection, this work reveals the meticulous detail that made Buonaccorso one of the most prominent painters of his time.

Notice the delicate rendering of Christ crowning the Virgin, and the immense material wealth asserted by the ultramarine blue of her robe, made from precious lapis lazuli. The brilliant golden mandorla behind them is punched and burnished, creating an illusion of radiating fire.

Buonaccorso's mastery extends to the smallest elements. The gothic arch of the frame deliberately mirrors the flame-like rays of the mandorla. Even more remarkable, if you look closely, tiny seraphic faces are embedded within the uppermost golden flames.

This painting is a testament to the artist's ability to imbue every inch with sacred significance and breathtaking craftsmanship, inviting viewers to discover hidden wonders within its golden glow.