France, March 28 -- Arriving by helicopter from Rome, the pope was greeted by Prince Albert II and Princess Charlene at Monaco's heliport.

The US-born pope, a former missionary critical of the wealthy elite, will start his trip at the Prince's Palace, the official residence of the Grimaldi dynasty.

Just after his arrival at the tiny principality on the French Riviera, Leo condemned what he termed the widening "chasms between the poor and the rich."

In an address in French from the balcony of the Prince's Palace, the American pope denounced "unjust configurations of power, structures of sin that dig chasms between poor and rich, between the privileged and the rejected, between friends and enemy."

He added wealth should serve "law and j...