“Everybody has heard of the great Heidelberg Tun, and most people have seen it, no doubt. It is a wine-cask as big as a cottage, and some traditions say it holds eighteen hundred thousand bottles, and other traditions say it holds eighteen hundred million barrels. I think it likely that one of these statements is a mistake, and the other is a lie. However, the mere matter of capacity is a thing of no sort of consequence, since the cask is empty, and indeed has always been empty, history says. An empty cask the size of a cathedral could excite but little emotion in me. I do not see any wisdom in building a monster cask to hoard up emptiness in, when you can get a better quality, outside, any day, free of expense.” TwainHeidelberg Tun Book:A Tramp Abroad Source: A Tramp Abroad