I will present the study of the X-ray emission from the Galactic Centre
(GC) Molecular Clouds (MC), within the Central Molecular Zone. The MC
spectra show all the features characteristic of reflection: intense FeKalpha,
with EW of about 0.7-1 keV, flat power law continuum and significant
FeK edge. 
The temporal evolution of the MC emission, with its complex
pattern of variations, as well as the apparent super-luminal motion of a
light front illuminating a Molecular nebula will be discussed.
The line intensities, clouds dimensions, columns densities and positions
with respect to SgrA*, are found to be consistent with being reflection of
a past period of activity of SgrA*. The required high luminosity (about
1.5*1039 erg s-1) can hardly be produced by an binary system, while it is
in agreement with a flare of SgrA* fading about 100 years ago. Other
possible interpretations will be also discussed.