Fra Angelico's 'The Trial by Fire of St. Francis before the Sultan', painted c. 1450, depicts St. Francis before the Sultan, offering to walk through fire to prove his faith. The painting is executed in tempera on panel, showcasing the artist's characteristic clarity and grace.

Painted around 1450, Fra Angelico's 'The Trial by Fire of St. Francis before the Sultan' depicts a legendary episode in the life of St. Francis of Assisi. The painting is executed in tempera on panel, a common medium during the Early Renaissance. Fra Angelico, an Italian painter known for his religious works, infused this piece with a sense of serenity and spiritual depth. The scene portrays St. Francis, identifiable by his simple brown robe and tonsure, standing before the Sultan. The Sultan, dressed in elaborate robes and turban, is seated on a raised throne, surrounded by advisors. A small fire burns in the foreground, alluding to the trial by fire, where St. Francis offered to walk through flames to prove the truth of his faith. The composition is balanced, with figures arranged symmetrically around the central fire. The colour palette is dominated by blues, reds, and browns, with touches of gold. The architectural setting is rendered with precision, reflecting the Early Renaissance interest in perspective and classical forms. Fra Angelico's style is characterised by its clarity, grace, and attention to detail. His figures are often idealised, with gentle expressions and flowing drapery. The painting reflects the religious devotion and artistic innovations of the Early Renaissance period.