Marsala the area has been conquered by Norman, Angevin and Aragonese troops. During this time, Marsala became wealthy, primarily through trade. However the blocking up of the harbour of Punta Alga, decreed by Emperor Charles V so as to stop Saracen forays, brought an end to this period of prosperity. The development of Marsala wine at the end of the 18th century, headed by English merchants settled in Sicily, considerably improved local trade. This triggered an economic expansion in Marsala, including the funding of infrastructure projects such as the current harbour of Margitello. On 11 May 1860 Giuseppe Garibaldi landed at
Marsala wine Palermitano by adoption, bought up great swathes of land between the two largest established Marsala producers and set to making his own vintage with even more exclusive range of grape. Florio purchased Woodhouse's firm, among others, in the late nineteenth century and consolidated the Marsala wine industry. Florio and Pellegrino remain the leading producers of Marsala today. Marsala is produced using the Grillo, Inzolia, Catarratto and Damaschino white grape varietals, among others. Marsala contains about 15–20% alcohol by volume. Different Marsala wines are classified according to their color, sweetness, and the duration of their aging. The three levels of sweetness