Video footage showed the man, identified as Marcello Di Finizio, jumping over railings near the top of the 450-foot high dome on Tuesday afternoon, shocking visitors taking a tour. He then tied a cord to the railings and abseiled to a ledge over a window in the cupola.
Tottering on the ledge, Di Finizio unveiled a banner reading: "Help! Enough Monti, Enough Europe! Enough Multinationals!".
Officials said Wednesday that the man, who identified himself as the owner of a beach resort, refused appeals from government ministers offering to meet with him if he would come down.
-- Reuters and The Associated Press contributed to this report
