Classical Cepheids (CCs) are the standard calibrators of the cosmic distance scale, but the current “Hubble tension” motivates the use of alternative tracers. Anomalous Cepheids (ACs) and Type II Cepheids (T2Cs), being older and less massive, are widespread in the Milky Way and dwarf galaxies and follow tight Period–Luminosity (PL) and Period–Wesenheit (PW) relations, especially in the near-infrared.
We present new multi-wavelength PL and PW relations for T2C subclasses and for both modes of ACs in the Magellanic Clouds, using OGLE, Gaia, and VMC data. Based on over 500 variables, these relations provide distances to Local Group systems consistent with those from CCs and RR Lyrae. Ongoing work extends the analysis across a wider metallicity range with photometry and high-resolution spectroscopy.