Rebecca Robertson’s “vision for the armory as a 21st-century arts center is hitched to ‘the power of the space.’ It means using that unobstructed drill hall–an area she says is unavailable elsewhere in New York City–to accommodate spectacles like ‘Leonardo’s Last Supper.’ And instead of following the normal practice of focusing on one or more of the performing arts or on the visual arts, ‘We do all of the arts equally,’ Ms. Robertson says.”