**This is a Zoom Colloquia!**
The Imaging X-Ray Polarimetry Explorer (IXPE) is a joint US-Italian mission that enables highly sensitive polarimetry observations of bright galactic and extragalactic sources within the 2-8 keV X-ray band. In this talk, I will highlight the IXPE observations of stellar mass black holes in X-ray binaries and the implications of the observations. I will close by describing two upcoming missions, one aiming at measuring X-ray polarization at higher energies (15-80 keV), and another one aiming at elucidating the origin of the 511 keV gamma-ray emission from the center of the Milky Way.