Mr. Sodi has made these timbers with the help of about 20 craftspeople in Oaxaca and has had them sent to New York by truck.
On the morning of the event, Mr. Sodi said in an interview, he is to install the wall with the help of Mexican artists and friends who live in New York. Starting around lunchtime, though, visitors — of any nationality — would take apart the wall. Each participant would be invited to take home a clay timber.
“I wanted to create a wall made by Mexicans with Mexican earth,” Mr. Sodi said. “Then the disappearance of the wall will be by the community and all kinds of people who visit the park.”