Let W+, W- be the Wernau points, A+, B+, C+ be the apices of the Fermat external triangles, A-, B-, C- the same of the internal ones. The circles {AW+A+}, {BW+B+}, {CW+C+} intersect at W+ and at an isodynamic point. The circles {AW-A-}, {BW-B-}, {CW-C-} intersect at W- and at an isodynamic point.