Before revision:  Its Triangle Centers ( Incenter, Barycenter, etc. ) sweep remarkable loci: ellipses , circles, quartics, sextics, and even a stationary point.
After revision:  Its Triangle Centers ( Incenter, Barycenter, etc. Many points have ellipses as loci, but some are also quartics, self-intersecting curves of higher degree , circles, quartics, sextics, and even a stationary point.