Black faux-pearls lend a decidedly gothic tone to Nicholas Kirkwood's black suede Casati ankle boots – a detail lifted from the extravagant lifestyle of muse Luisa Casati. They're made in Italy with a high top edge that grazes along the shin, and are decorated with an arch strap that is trimmed with gunmetal hardware and a black suede heel tab. Watch them instantly toughen a long fluid skirt.