AS all the world knows, the old fortifications of Vienna have been pulled down,-the fortifications which used to surround the centre or kernel of the city; and the vast spaces thus thrown open and forming a broad ring in the middle of the town have not as yet been completely filled up with those new buildings and gardens which are to be there, and which, when there, will join the outside city and the inside city together, so as to make them into one homogeneous whole. The work, however, is going on, and if the war which has come and passed has not swallowed everything appertaining to Austria into its maw, the ugly remnants of destruction will be soon carted away, and the old glacis will be made bright with broad pavements, and gilded railings, and well-built lofty mansions, and gardens beautiful with shrubs, and beautiful with turf also, if Austrian patience can make turf to grow beneath an Austrian sky.