The troubles for the “Trinity Root” began with an inquiry about touching up the sculpture’s patina. (snip) But according to Mr. Tobin and his manager, Kathleen Rogers, the conversation about patina opened a larger discussion about the sculpture’s placement: Now, they fear it will be moved or “just disappear,” said Ms. Rogers. (snip) Ms. Rogers is unconvinced. “There’s something in the works for them to find a way to get rid of it,” she said. “Trinity Root” was inspired by the story of a massive sycamore tree that shielded—and some say helped to save—the nearby St. Paul’s Chapel from the...