London—The market for the relatively esoteric Italian art movement of the mid-1960s known as Arte Povera (Poor Art) took a giant leap forward at Christie’s on Tuesday evening with a single-owner sale that earned £38,427,400 ($63,020,930). The figure compared well to pre-sale expectations of £25.7-36.5 ($42.1-59.9 million). Of the very large number of offerings in the […]