Unidentified depiction 

This “Unidentified Depiction” was created by Pietro da Cortona in the 17th century using pen and brown ink with brown wash on paper. The quick application of the ink reveals how the artist has built up tonal depth and created a sense of drama. You can see how the artist has captured the liveliness of the scene, by freely moving the pen to capture movement with layered brushstrokes, and through the use of wash. Washes are diluted ink, and help the artist achieve shadows by adding thin layers. The artist's skill is visible in the different ways he handles the pen and brush, in some areas, like the angel's wings, he has rapidly moved the pen to give a feeling of airiness and spontaneity. This freedom shows the artist’s virtuosity in the traditional art of drawing, where the artist has complete control of the tools and materials, to create a study in preparation for a larger artwork. This work can be appreciated for the artist's use of materials, his craft, and his understanding of the social contexts in which the drawing was made. This elevates it beyond a mere preparatory sketch.