"The last day of Pompeii", painted between 1830 and 1833 by K.P. Bruelow, State Russian Museum, Saint Petersburg. I posted about the taphonomy of the volcanic eruption of the Vesuvius here. There exists also an reconstruction of the eruption phase in form of a documentary by the Discovery Channel.
Boundary value conditions, domain applicability and "American Sniper"
7 hours ago in The Curious Wavefunction