Paleologus, emperor of Constantinople, was assisted in 1303 by a body of adventurers from the west of Europe, against the Ottomans, who were defeated; but the Greek Emperor found his allies not less destructive than his Asiatic enemies. By using bribes, threats, and force, he got rid of his troublesome friends. He was not, however, permitted to live in peace. His grandson Andronicus rebelled in 1320; and after a succession of contests, the elder competitor was forced to abdicate in 1328. During those disgraceful struggles, the common enemy, the Ottomans, completed the conquest of Bithynia, and advanced within sight of Constantinople. The younger Andronicus lived till 1341.

ANDRONICUS of Cyrrha, a Greek astronomer, about B.C. 100, built at Athens an octagon tower, with figures carved on each side, representing the eight principal winds. A brazen Triton at the summit, with a rod in his hand, turned round by the wind, pointed to the quarter from whence it blew. From this model is derived the custom of placing weathercocks on steeples. A considerable portion of this tower still exists, and, instead of "tower of the winds," it should be called horologium, the name by which it is designated by Varro.

ANDRONICUS of Rhodes, a peripatetic philosopher, to whom has been attributed the arrangement of the works of Aristotle, after the manuscripts had been brought to Rome by Sulla. Tyrannion the grammarian placed them in his hands, and certain commentaries on the works of Aristotle have been ascribed to him. Andronicus lived about B.C. 60.