A photograph of a drawing depicting a horse now in the Albertina Museum, Vienna (inv. no. 267) where it is attributed to Giovanni Battista Franco. Annotated on the verso.
This drawing is after one of the bronze horses now in the Museo Marciano, Venice. This ancient group (4th century BC) arrived in Venice at the end of the 4th Crusade in 1204 and was placed on the facade of St Mark's Basilica. See also RCIN 854589.
The body of the horse was originally drawn in black chalk and only horse's head in red chalk. Owing to technological limitations, it would not have been possible to reproduce the two different colours in a photograph taken in the mid-nineteenth century, so presumably the photographer decided to print the carbon print with a red colour tone to replicate the horse's head and therefore the red colour appears on the whole sheet.