The extension to the Royal Ontario Museum (ROM), now named the Michael Lee-Chin Crystal, is situated at one of the most prominent intersections in downtown Toronto. It is the largest Museum in Canada and attracts more than a million visitors a year. Its new name is derived from the building’s five intersecting metal-clad volumes, which are reminiscent of crystals—inspired by the crystalline forms in the ROM’s mineralogy galleries. Libeskind created a structure of organically interlocking prismatic forms turning this important corner of Toronto, and the entire museum complex, into a luminous beacon. The design succeeds at inviting glimpses up, down,...