The New Testament recalls that Peter the Apostle was thrown into prison in Jerusalem on the order of King Herod. On the night before he was to be paraded before the people, Peter was awoken by an angel, who miraculously freed him of his shackles and rescued him from imprisonment. In contrast with older Renaissance and Baroque depictions of the same motif, in which the active role of the divine messenger and the apostle’s traditional elderly, awakening face are emphasized, here the foreground is dominated by a close-up of the apostolic champion. The saint holds a book to his chest and is turning back to his left, towards the ethereal figure of the angel. Their eyes do not meet and their arms are painted with special attention to detail. The extremely elegant appendages of both Peter and the angel, with slender fingers, and with the apostle’s left hand posed just so, match the details of Henrika Langus’s studies of human hands. This is the reason why the painting, first assumed to have been produced by Matevž Langus, is now attributed to his niece, adoptee, and even student. Henrika Langus inherited from her uncle a painting style that centered on extremely precise drawing.