Let I be the incenter; Oa, Ob, Oc the circumcenters of IBC, ICA, IAB; O'a, O'b, O'c their reflections on the sides; Ha, Hb, Hc the orthocenters of IBC, ICA, IAB. The lines O'aHa, O'bHb, O'cHc concur at the Nagel point Ng.