Bartolomeo Vivarini, Saints Dominic, Augustine, and Lawrence
SS. Giovanni e Paolo, Venice
St. Dominic is on the left in his Dominican habit. His attributes in this case are the lily stalk and book. St. Augustine is in the center wearing his elaborate "pontificals." On the right, St. Lawrence's attributes are his
the sleeved outer garment worn during the liturgy by deacons
Read more about images of St. Augustine, St. Dominic, and St. Lawrence.
Source: this page at Wikimedia Commons.