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This paper discusses the historical evidence for the jets from the centralBlack Hole of the Galaxy in the 4th and 14th centuries. We suggest that theapparitions of a "lightening cross" during the day time recorded in 312, 351and 1317 were caused by the line of two jets beamed back-to-back from thecentral black hole and crossed the visible projection of the Galaxy disc. Allthree historical accounts that record the flashing signs of a cross giveprecise time and geographical locations of these astronomical events (thevicinity of Rome, Jerusalem and the vicinity of Moscow respectively) and mostimportantly the position in the sky in connection to the Sun. These positionscoincide with the location of the Milky Way center on the sky in these specificplaces and dates. Therefore, it is logical to assume that the intersection ofthe jets and the lighted projection of the Galaxy disc was the source of thecross visions in the Middle Ages. The forth evidence of crossing lights isfound in russian chronicle under 1377 year. This event took place in the nightsky under Moscow.

Jet activity in the central BH of the Milky Way in 4th and 14th centuries CE