Nicolai Ouroussoff says that Daniel Libeskind’s new addition to the Denver Art Museum is a mighty piece of work, but also one which embodies “all of the contradictions within Mr. Libeskind’s oeuvre. Its bold, often mesmerizing forms reaffirm the originality of his talent, yet its tortured geometries make it a daunting place to install or view art — hardly a minor drawback. And for all its emotional power, the building seems eerily out of date, and its flaws readily apparent.”