Brooks Brothers is moving into a store at Rockefeller Center. The clothing line is taking over the French Connection UK’s duplex at 1270 Sixth Avenue, at 51st Street, which has 2,936 square feet on the ground level and 1,031 square feet on the concourse level. Brooks Brothers will start renovations in March and is expected to open in the summer. Brooks Brothers will close its store at Kushner-owned 666 Fifth Avenue, where an Abercrombie & Fitch store will open. Brooks Brothers is also expanding its store at 346 Madison Avenue to include the next door space at 11 East 44th Street.