  Translation by S. Antoci and A. Loinger of the fundamental memoir, that
contains the ORIGINAL form of the solution of Schwarzschild's problem. The
solution is regular in the whole space-time, with the only exception of the
origin of the spatial co-ordinates; consequently, it leaves no room for the
science fiction of the black holes. (In the centuries of the decline of the
Roman Empire people said: ``Graecum est, non legitur''...).
