Michael Kimmelman will be replacing longtime architecture critic Nicolai Ouroussoff, who is leaving the Times to pursue other projects, including a new book. For the past four years, Kimmelman has served as art critic, foreign correspondent and "Abroad" columnist at the Times. "As for architecture," wrote Times culture editor Jonathan Landman in a memo to staff, "you may recall among other things his recent Times Magazine profiles of Oscar Niemeyer, Shigeru Ban and Peter Zumthor, his pieces in The New York Review of Books about Frank Lloyd Wright and the New York baseball stadiums, and this dispatch about the restoration of an old museum in Berlin. His writings in the field go back to his days between Yale and Harvard as a fledgling editor at ID Magazine and architecture critic for The New England Monthly." Congratulations, Michael! We look forward to joining you in your exploration of the built world in which we live.