Daniel 7:1
In the first year of Belshazzar king of Babylon Daniel had a dream and visions of his head upon his bed: then he wrote the dream, and told the sum of the matters.
In the first year of Belshazzar king of Babylon,.... Daniel having finished the historical part of his book, and committed to writing what was necessary concerning himself and his three companions, and concerning Nebuchadnezzar, Belshazzar, and Darius the Mede, proceeds to the prophetic part, and goes back to the first year of Belshazzar's reign, seventeen years before his death, and the fall of the Babylonish monarchy last mentioned; for so long Belshazzar reigned, according to Josephus {u}; and with which agrees the canon of Ptolemy, who ascribes so many years to the reign of Nabonadius, the same, with Belshazzar: he began to reign, according to Bishop Usher {w}, Dean Prideaux {x}, and Mr, Whiston {y}, in the year of the world 3449 A.M., and 555 B.C.; and in the first year of his reign Daniel had the dream of the four monarchies, as follows: