" Nathaniel Willis, having spent his first week walking the city in drizzling rain, said that when the sun burst forth at last it so changed all his previous impressions that he had to set off and see it all a second time. “And it seemed to me another city,” he wrote. “I never realized so forcibly the beauty of sunshine. Architecture, particularly, is nothing without it. "

― David McCullough , The Greater Journey: Americans in Paris