What is Gian Gastone de' Medici, Grand Duke of Tuscany?
{{Infobox royalty | type = monarch | name = Gian Gastone | image = Richter, Franz Ferdinand - Official portrait of Gian Gastone de' Medici in grand ducal robes.jpg | alt = A peri-wigged man is resplendent in gold, ermine-fringed coronation robes. The man holds the royal sceptre of Tuscany in his right hand; at the same time clenching the royal crown. The cross of the order of Saint Stephen Pope and Martyr adorns his neck. The Cathedral of Santa Maria del Fiore lies crumbling against a dark sky outside the window. | caption = | succession = [[List of rulers of Tuscany|Grand Duke of Tuscany]] | reign = 31 October 1723 &ndash; 9 July 1737 | predecessor = [[Cosimo III de' Medici, Grand Duke of Tuscany|Cosimo III de' Medici]] | successor = [[Francis I, Holy Roman Emperor|Francis Stephen of Lorraine]] | spouse = Anna Maria Franziska of Saxe-Lauenburg | issue = | issue-link = | full name = Giovanni Battista Gastone de' Medici | house = [[House of Medici]] | anthem = | father = [[Grand Duke Cosimo III de' Medici]] | mother = [[Marguerite Louise d'Orléans]] | birth_date = 24 May 1671 | birth_place = [[Pitti Palace]], [[Florence]], [[Grand Duchy of Tuscany|Tuscany]] | death_date = {{Death date and age|1737|07|09|1671|05|24|df=y}} | death_place = Pitti Palace, Florence, Tuscany | burial_place = Basilica of San Lorenzo | religion = [[Roman Catholicism]] }} '''Gian Gastone de' Medici''' (24 May 1671 – 9 July 1737) was the last [[House of Medici|Medici]] [[Grand Duke of Tuscany]]. He was the second son of [[Cosimo III de' Medici, Grand Duke of Tuscany]] and [[Marguerite Louise d'Orléans]]. His sister, [[Anna Maria Luisa de' Medici]], the Electress Palatine, married him to [[Anna Maria Franziska of Saxe-Lauenburg]] in 1697. The two remained chi