Let A'B'C'  be the circlecevian triangle of P, and let A", B", C" the orthogonal projections of A', B', C' on the sides of ABC. Then AA", BB", CC" concur at a point Q. As exemple:
· when P is the incenter or X(80), then Q is the Nagel point
· when P is a Fermat point, Q is the centroid
· when P is the circumcentre or X(265), Q is the Prasolov point.