Piece by piece, New Orleans' landscape is changing as city workers take down massive works of bronze and stone that once seemed immoveable in a region where some still cling to a Confederate legacy. The city announced late Tuesday that it had begun the process of removing a statue of Confederate Gen. P.G.T. Beauregard — the third of four monuments city officials plan to take down. The news release came as police cordoned off the site and what appeared to be a large crane was moved into position. Workers later wrapped what appeared to be green bubble wrap around the statue and affixed it to a crane with large straps but as the process dragged into Wednesday morning it was not clear how long it would take to remove the massive bronze likeness of Beauregard on horseback. "Today we take another…