  NGC 1624-2 is the most strongly magnetized O-type star known. Previous
spectroscopic observations of this object in the ultraviolet provided evidence
that it hosts a large and dense circumstellar magnetosphere. Follow-up
observations obtained with the \textit{Hubble Space Telescope} not only confirm
that previous inference, but also suggest that NGC 1624-2's magnetosphere has a
complex structure. Furthermore, an expanded spectropolarimetric time series
shows a potential departure from a dipolar magnetic field geometry, which could
mean that the strongest field detected at the surface of an O-type star is also
topologically complex. This result raises important questions regarding the
origin and evolution of magnetic fields in massive stars.
