Il Museo Storico Navale di Venezia is a very interesting place to visit especially if you are interested in naval battles etc. We were not so interested in the extensive more recent part of the collection but spent a long time looking at the older pieces and excellent models.
There are some really well-crafted models of old vessels from Roman times to times when the Venetian navies had a powerful influence. There is a beautiful model of the last Bucintoro -the ceremonial boat used by the Doges. The last Bucintoro was burnt by the French in the late 1700s - Napoleon wrecking another bit of Venice.
We have been meaning to visit this museum for years and are glad that we finally did. We were there for a long while but you could spend many hours if you are interested in WW1 and WW2 naval battles and artifacts. It is absolutely worth a visit.
A highly decorated old Venetian cannon. The photos below show some of the detail
The Venice lion was on everything
There were many old maps and models.