School of Aleppo, St. Stephen
Pinacoteca Vaticana, Rome
As in most Eastern images, Stephen is shown with a censer and book, and not stones. The censer and book refer to two of the deacon's functions during the sacred liturgy. The long, loose vestment is called a sticharion in the East, similar to the Roman dalmatic. The long band of cloth is an orarion, the symbol of an Eastern deacon's office.
This image in full resolution
More of St. Stephen
Source: Photographed at the site by Richard Stracke, shared under Attribution-NonCommercial-ShareAlike license.