This one would have been a very good design, had it appeared about five years earlier: The Erzherzog-Karl-class.
Considerably larger than their predecessors of the Habsburg-class, these second-class battleships struck a fine balance between armour (210mm KC), armament (4x 240/40 and 12x 190/42, plus 12x66/50) and speed (20,5 kts) on barely 10.500 tons of displacement. With their low freeboard, they were not really oceangoing, but they were good enough for the Adriatic and fair matches for the Italian Regina-Elena-class. They just needed to stay clear of any real first-class pre-dreadnoughts, of which the Italians fortunately had only two.
The first two units were completely identical; the last one - Erzherzog Ferdinand Max, named for the unfortunate Emperor of Mexico - differed in minor detail (funnel bases, cranes). All were designed with a bridge overhanging the whole CT.
The bridge was made smaller upon or quickly after commissioning; from contemporary photographs, I could not deduce if some or all of them were already commissioned with a smaller bridge. Before the war, they were fitted with a w/t rig and rangefinders on their lateral fire-control towers; again, contemporary photographs do not show any range-finding equipment fore or aft.
The only significant wartime modification was the addition of two 66/50 on HA mounts. They saw little action, but were used to put down a mutiny on two armoured cruisers in Cattaro in 1917; morale and discipline among their crews were apparently intact right to the end.
Ferdinand Max was allocated to Great Britain after the war, and the other two to France. All three were scrapped by 1920.