Eclipses have always been a powerful tool for astronomy: for the solar
system,for binary stars and for exosolar planets. Now we see that
comparable X-ray absorption variations are extraordinarily powerful in
diagnosing the inner structure of AGNs. The little-studied AGN in
NGC1365 shows many of these features in a uniquely telling way. I will
give a series of examples, ranging in scale from the 'torus' to ~10
Rg, using data from Chandra, XMM-Newton and Suzaku.