The Washington Post: "Managers of a downtown office building yanked a sculpture called 'Unmentionables . . . then and now' from an exhibition last week after tenants complained that the art was inappropriate. The offending art, by Joyce Zipperer, ... consists of 10 styles of women's underwear -- from old-fashioned bloomers to a skimpy thong -- all made out of metal and strung along a clothesline."
You can see images of the work at the link.
There doesn't seem to by any legal issue: the building owner apparently required participating artists to sign a contract which provides that "The work may be withdrawn from the exhibition by [the building owner] at its discretion at any time."