The auction house has signed a 30-year lease on a Brooklyn warehouse that currently houses “piles of dust and detritus as it looms over the weeds and gritty businesses of Imlay Street. But come January, Christie’s executives say, the building will boast infrared video cameras, biometric readers and motion-activated monitors, as well as smoke-, heat- and water-detection systems. Inside, the warehouse will hold the likes of van Gogh, Monet, Picasso and Brancusi, with each collection potentially worth more than the building itself.”