Complex sentence: The Doge of Venice was also styled "Serenissimus" (Latin'Most Serene'), the crowned republic and the (later Austrian, then Italian) city itself remain widely known as "(la) Serenissima".
Split into simpler sentences: The Doge of Venice was also styled "Serenissimus" (Latin'Most Serene'). The crowned republic and the (later Austrian, then Italian) city itself remain widely known as "la Serenissima".