Fra' Sir Emmanuel de Rohan-Polduc (April 18, 1725 la Mancha, Spain - July 14, 1797 Valletta, Malta) was a member of the wealthy and influential Rohan family of France, and 70th Prince and Grand Master of the Order of Malta from 1775 to 1797. Rohan-Polduc succeeded the unpopular Grand Master Francisco Ximenes de Texada. During his rule Fort Tigne was built and St. Lucian's Tower and battery were upgraded, and as result of this upgrading the tower was renamed Fort Rohan. The Grand Master was also responsible for the publication of the Diritto Municipale in 1784.