Each head, which will be installed in the order of the original Chinese zodiac (rat, ox, tiger, rabbit, dragon, snake, horse, goat, monkey, dog, and pig), will range in weight from 1,500 to 2,100 ...

A drawing of a bear's head by Leonardo da Vinci is seen fetching up to $16.7 million, potentially setting a record, when it heads to auction in July, Christie's said on Saturday.