  Active galactic nuclei play a key role in the evolution of galaxies, but
their inner workings and physical connection to the host are poorly understood
due to a lack of angular resolution. Infrared interferometry makes it possible
to resolve the circumnuclear dust in the nearby Seyfert 2 galaxy, Circinus.
Previous observations have revealed complex structures and polar dust emission
but interpretation was limited to simple models. MATISSE makes it possible to
image these structures for the first time. We observed the Circinus Galaxy with
VLTI/MATISSE, producing 150 correlated flux spectra and 100 closure phase
spectra. We reconstructed images in the N-band at ~10 mas resolution. We fit
blackbody functions with dust extinction to several aperture-extracted fluxes
from the images to produce a temperature distribution of central dusty
structures. We find significant substructure in the circumnuclear dust: central
unresolved flux of ~0.5 Jy, a thin disk 1.9 pc in diameter oriented along ~45
deg,and a ~4x1.5 pc polar emission extending orthogonal to the disk. The polar
emission exhibits patchiness, which we attribute to clumpy dust. Flux
enhancements to the east and west of the disk are seen for the first time. We
distinguish the temperature profiles of the disk and of the polar emission: the
disk shows a steep temperature gradient indicative of denser material; the
polar profile is flatter, indicating clumpiness and/or lower dust density. The
unresolved flux is fitted with a high temperature, ~370 K. The polar dust
remains warm (~200 K) out to 1.5 pc from the disk. The recovered morphology and
temperature distribution resembles modeling of accretion disks with
radiation-driven winds at large scales, but we placed new constraints on the
subparsec dust. The subparsec features imaged here place new constraints on the
physical modeling of circumnuclear dust in active galaxies.
