A 1943 wooden mobile by Alexander Calder has been given an estimate of $15 million to $20 million, the highest for a work by ...
This week, Altman Siegel in San Francisco became the latest in a string of galleries to close. Founded by Claudia ...
Considered one of—if not the–most important living artist today, Gerhard Richter pioneered a new mode of painting. Deftly ...
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