Officials at the Solomon R. Guggenheim Museum were tight-lipped on Thursday night about an unusual email exchange in which its chief curator is said to have rebuffed a White House request for a Vincent van Gogh painting and offered a gold toilet instead.

The exchange between the curator, Nancy Spector, and Donna Hayashi Smith of the White House’s Office of the Curator was reported Thursday afternoon by The Washington Post.

Citing a Sept. 15 email that The Post said it had obtained, the newspaper reported that Ms. Spector had turned down the White House’s request to borrow van Gogh’s “Landscape With Snow,” which officials had hoped they could use to decorate President and Melania Trump’s living quarters.

As an alternative, The Post said Ms. Spector offered up what one might call a “participatory sculpture”: a fully functional, solid 18-karat-gold copy of a Kohler toilet titled “America” that more than 100,000 people had already used in a museum restroom.