Revelation 16:8

And the fourth Angel. Here is the punishment of the Greeks during the siege of Constantinople by the Turks, where the fire engines, that were then made use of for the first time, so reduced the Grecian army, that the walls of the city were reduced to ashes, and the whole town to flames. Hence it appears how the Greeks were scorched with great heat; and how they blaspheme the name of God, appears too evident from the history of Notaros, admiral of the Constantinopolitan fleet. (Pastorini)