Yes, but Cepheids are calibrated, fundamentally, by parallax. (I believe that no Cepheids were actually close enough to be calibrated directly by parallax, at

Yes, but Cepheids are calibrated, fundamentally, by parallax. (I believe that no Cepheids were actually close enough to be calibrated directly by parallax, at least until Gaia, so they had to be calibrated by other techniques which were, in turn, calibrated by parallax.)