WARSAW, Poland, May 17, 2012 /PRNewswire/ -- During the last few days Manuel Rosa, author of "KOLUMB.

Evidence that a Florentine merchant house financed the earliest English voyages to North America.

NEW YORK and LONDON, Jan.

HONG KONG, Sept.

BADAJOZ, Spain, Nov. 26, 2010 /PRNewswire/ -- Christopher Columbus was a Royal Prince, son of a Portuguese noble lady and exiled Polish King Vladislav III, according to Columbus' new biography, "COLON. La Historia Nunca Contada" (COLUMBUS.