At the beginning of the 90th, many studies were tending towards the presence of a supermassive compact source at the gravitationnal centre of the Galaxy. Adaptive optics was the instrumental breakthrough that cleared up the uncertainties on the nature of the central compact source, revealing its black hole nature and its properties.
In this presentation, I will review first what Adaptive Optics have brought in our knowledge of the Galactic Centre and its supermassive black hole but also the questions still pending on the black hole emission mechanism and the central star formation history.