Aby Rosen, the Seagram Building landlord who's threatening to remove a frail Picasso curtain at risk of damage, is having his day in court. Nonetheless, alongside former friend and New York Landmark Conservancy spearhead, Peg Breen. The duo's relationship has deteriorated in recent months, despite Rosen's prior work in restoring Lever House, and large-sum donations to the Conservancy. "Museums rotate their art every three or four months," Rosen told the Times. "Just because it's been there a long time doesn't mean it has to stay there." [NYT; previously]