The San Lorenzo Zustinian-class were a class of at least twenty-nine 70-gun third rate ships of the line built by the Venetian Arsenale from 1691 to 1746, in three different series with minor changes in the ships' length. It was the most numerous class of ship of the line built in Venice, and the last to see active service in a war against the Ottoman Empire in 1718. All this class' ships were planned before 1720, and the vast majority was launched before the Peace of Passarowitz. The last four vessels were completed to 70% in 1720s, then stored in the roofed shipbuilding docks of the Arsenale to be finished and launched between 1739 and 1746, a solution that was widely used with the following Leon Trionfante-class.