Polychrome glass, glass rods, plaster of Paris, iron, wax; pulled, cut, assembled, embedded. Micromosaic panel in a carved gilt wood frame; made of minute glass tesserae (smalti filati), showing a view of St. Peter's Square in Rome at the time of a Sunday benediction of Pope Leo XIII. The Pope can be seen in the background standing on the balcony blessing a large gathering of pilgrims; in the foreground promenade elegantly dressed figures. A panel with this design was commissioned by the Pecci family in 1879 from the master mosaicist Biagio P. Barzotti at the Vatican Mosaic Workshops; the panel is signed in the lower left corner "B.P. Barzotti, R.F.S.P.".