 Complete the following phrase:  The Leon Trionfante-class were a class of at least fourteen 70-gun third rate ships of the line built by the Venetian Arsenale from 1716 to 1785, in four different series with minor changes in the ships length. In 1797, when Venice fell to the French, Napoleon captured several ships of the class, still unfinished in the Arsenal: he chose one of them, forced the shipbuilders to have it completed and added it to his fleet 