Who funded Christopher Columbus on his exploration and for what reason?

Contrary to popular belief, Columbus was not looking for a new world or trying to prove that the world was round. Scholars already knew the world was a sphere and a new world was only dreamt of. The purpose of his voyage was to map out a new, elusive sea trade route to Asia. King Ferdinand V and Queen Isabella I were the rulers of Spain at the time and finally agreed to finance Columbus' voyage because it could severely boost Spain's economy, bring in gold, jewels, spices and slaves. Also, since all of the new land would be claimed for Spain and Columbus would discover the route (for Spain) the queen and king of Spain would have complete control of the trade route, makiong them even richer.

More info: The Santa Maria crashed on a rock and Cristopher Colombust went on the ship called the Nina.