  This paper discusses the historical evidence for the jets from the central
Black Hole of the Galaxy in the 4th and 14th centuries. We suggest that the
apparitions of a "lightening cross" during the day time recorded in 312, 351
and 1317 were caused by the line of two jets beamed back-to-back from the
central black hole and crossed the visible projection of the Galaxy disc. All
three historical accounts that record the flashing signs of a cross give
precise time and geographical locations of these astronomical events (the
vicinity of Rome, Jerusalem and the vicinity of Moscow respectively) and most
importantly the position in the sky in connection to the Sun. These positions
coincide with the location of the Milky Way center on the sky in these specific
places and dates. Therefore, it is logical to assume that the intersection of
the jets and the lighted projection of the Galaxy disc was the source of the
cross visions in the Middle Ages. The forth evidence of crossing lights is
found in russian chronicle under 1377 year. This event took place in the night
sky under Moscow.
