Inscribed at lower right in pen and brown ink: Sebastien Ricci (Tessin). Numbered: 1338 (Sparre)

The main group of drawings by this artist is to be found in Museo Correr, Venice; it comprises nearly two hundred works, the majority bound in one volume, collected by Ascanio Molin (1738-1813), who may have known the artist personally. There one can trace Diziani's evolution from late baroque chiaroscuro washes, in the wake of his master Gregorio Lazzarini, via a crispy style influenced by Sebastiano Ricci to a more painterly approach, related to Pellegrini, in his late works.

This preparatory sketch for the painting in Chioggia cathedral ca be dated to 1734-45, when the chapel was erected. Its style is close to that of the Saint seeing a vision, in Museo Correr.

Felix and Fortunatus, brothers from Acquileia, were tortured and executed in the year 296 during the time of Diocletian. [Bjurström, It. Drawings, cat. no. 178]