Of the vast body of Roman painting we now have only a very few pockets of survivals, with many documented types not surviving at all, or doing so only from the very end of the period. The best known and most important pocket is the wall paintings from Pompeii, Herculaneum and other sites nearby, which show how residents of a wealthy seaside resort decorated their walls in the century or so before the fatal eruption of Mount Vesuvius in 79 CE. A succession of dated styles have been defined and analysed by modern art historians beginning with August Mau, showing increasing elaboration and sophistication.