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
Sweetness of wine Aszú dessert wines: In Spain, the rules applicable to the sweet and fortified Denominations of Origen Montilla-Moriles and Jerez-Xérès-Sherry In the United States, the wine industry measures the sweetness of must and wine in degrees Brix. Sweetness of wine The subjective sweetness of a wine is determined by the interaction of several factors, including the amount of sugar in the wine, but also the relative levels of alcohol, acids, and tannins. Sugars and alcohol enhance a wine's sweetness; acids (sourness) and bitter tannins counteract it. These principles are outlined in the 1987 work by Émile Peynaud, "The Taste of Wine".