Hubble Space Telescope (WFPC2) view of NGC6328. Left: grand-scale (∼16 kpc) image (obtained from https://commons.wikimedia.org/wiki/File:NGC6328hst05479606.png). Right: zoomed-in view of the central 4 kpc (indicated also in the black box on the left). CO(2​ − ​1) (black) and CO(3​ − ​2) (blue) 4σ contours of the maximum flux per channel. The central north-south oriented dust lane, correlated with the CO emission, is indicated with red arrows, along with a less prominent feature to the west marking the start of a faint spiral arm. The elliptical contours represent the stellar distribution from VLT in the J band. In the top right inset, we include the bipolar radio map from Angioni et al. (2019) and the spectral index between 8.4 GHz and 22.3 GHz.