The Fundamental Reference AGN Monitoring Experiment (FRAMEx) is a research activity established by the Celestial Reference Frame Department to study the physical processes that underly the multi-wavelength apparent positions and morphologies of active galactic nuclei (AGNs). Time-domain photometric and spectroscopic monitoring of AGNs is a key component of FRAMEx, as the physics of accretion onto supermassive black holes (SMBHs) occurs on scales of a few light-years, so AGNs exhibit complex variability on timescales of weeks, months, and years. For more information, see the Conceptual Background page.