From what does the sparkling wine Prosecco take its name?

Prosecco (in Italian) or Prosek (in Slovenian) is a former village and now a suburb of Trieste. If you check a map you will find Trieste in the northeast of Italy on the tiny strip of territory between Slovenia and the Adriatic Sea. Officially, of course, Trieste is an Italian city, but it is multicultural (it is known as "Trst" to the Slovenians). The population in Prosecco/Prosek is still mainly Slovenian; but it had been 92% Slovenian before the annexation of the "Austrian Littoral" to Italy in 1920 and the subsequent Italianisation.

Prosecco/Prosek is best known for giving the name to the white wine now loved around the world, Prosecco. The wine is produced not just in this suburb, but in a large designated area in the Veneto and Friuli Venezia Giulia regions. Prosecco is made from the Glera grape (before 2009 Glera was just known as the Prosecco grape) but denomination rules allow up to 15% of the wine to be other permitted varieties. Prosecco is almost always made in sparkling ("spumante") or semi-sparkling style ("frizzante"), but a still wine ("tranquillo") is also permitted. Within the larger designated area are two small DOCG ("Denominazione di origine controllata e garantita" – "controlled and guaranteed designation of origin”) areas, Conegliano Valdobbiadene Prosecco in the hills between the towns of Conegliano and Valdobbiadene, and Asolo Prosecco around the nearby town of Asolo. Prosecco Superiore is always spumante and comes only from these DOCG areas.