3. B. Altman’s on 5th Avenue
The film location for the exterior of B. Altman, the department store Midge goes to work for at the makeup counter in The Marvelous Mrs. Maisel, is at 365 Fifth Avenue at 34th Street. Though the landmarked building today is the Graduate Center of the City University of New York, it was built as a B. Altman department store.
The specific entrance the show films at is along 34th Street, You can see the grand awning and the set designers built custom windows to be fitted onto the facade to look like department store windows. The interior of the store is a set built within a former bank in Williamsburg, Brooklyn that is now the Williamsburg Art & Historical Center.
Another B. Altman location was at 629 6th Avenue between 18th and 19th Streets along Ladies Mile. The store today is the Container Store.