The Phoenix's by Xu Bin fly through the hollow halls of the Cathedral of St. John the Divine like Dragons above the hallowed grounds of Harry Potter's Hogwarts, though the sculptural creatures are in fact stationary and fill up most of the overhead space.  Phoenixes mythically rise from the ashes and these were were created by the aforementioned Chinese artists detritus found at a construction site at which he witnessed conditions he deemed unsafe.  Perhaps these giant birds having taken suggested flight. Also speak to New York City's great unfinished cathedral or the Gotham after 911 soaring anew and then again most likely Christ arisen as per their being placed in the seat of the Episcopalian archdiocese of New York.