sentences:  In the earlier sculpture show, this trick proved impossible for one piece, an Alexander Calder mobile whose wire inevitably hung at a true plumb vertical, "suggesting hallucination" in the disorienting context of the tilted floor.The next year, Messer acquired a private collection from art dealer Justin K. Thannhauser for the foundation's permanent collection.These 73 works include Impressionist, Post-Impressionist and French modern masterpieces, including important works by Paul Gauguin, Édouard Manet, Camille Pissarro, Vincent van Gogh and 32 works by Pablo Picasso.