During this hot Jerusalem summer, with every day in the 30s C, I envy the dome of the Shrine of the Book (of Dead Sea Scrolls fame) which gets a constant shower of cool water to keep the glazed terra cotta tile cladding from overheating.
In this extremely interesting article about the Shrine of the Book, I learned that
Kiesler [the U.S. architect] himself intended for this to feel like a purification of sorts, akin to the mikvah, the ritual bath practice that originated with the Essenes before being adopted by mainstream Judaism. This is also reflected in the fountains that play against the dome.More photos are at http://jerusalemhillsdailyphoto.blogspot.co.il/2010/08/reflecting-on-apocalyptic-imagination.html.
Like the fact that the space is underground, the water feature also contributes to the maintenance of a cool interior in the extreme Jerusalem heat---and also likely contributes to wear on the tiles, necessitating their eventual replacement and repair.