On the limestone slopes at the southern edge of the village of Saint-Émilion sits one of Bordeaux's smallest and most coveted estates. Château Ausone makes barely a couple of thousand cases of wine a year, yet for more than a century it has stood at the top of the Right Bank's hierarchy. It is a property defined by paradoxes: ancient but restless, microscopic in scale but monumental in reputation, fiercely private yet world-famous. To understand it is to understand a single family's two-millennia relationship with one extraordinary hillside.