This week, the room is expensive and the light is good. Sotheby's opens spring auction season with a Rothko expected to fetch up to $100 million. Christie's Geneva closed a record-setting blue-green diamond at $17.3 million. Belmond brought a Renaissance convent back to life above Florence. Lake Como is about to become the world's most beautiful traffic jam. Eight lucky photographers are heading to Patagonia. And Bonhams Hong Kong is giving Japanese whisky collectors a two-bottle problem with no easy answer. The $100 Million Rothko Anchoring Sotheby's Biggest Week of the Year Sotheby's is kicking off spring auction season with the Modern and Contemporary Sales open at the Breuer on May 14, headlined by Robert Mnuchin: Collector at Heart, a single-owner evening sale estimated above $130 million. The crown jewel is a Mark Rothko titled "Brown and Blacks in Reds," expected to land somewhere between US$70 and US$100 million. The..