ALLEN: U.S. President Barack Obama travels to Cuba Sunday for the start of his historic tour. One thing that may look familiar to him while he is there, the Cuban capitol building. Here's CNN's Patrick Oppmann from Havana.</s>PATRICK OPPMANN, CNN CORRESPONDENT: When Barack Obama visits Cuba some of the scenery may seem a little familiar. No, we are not in Washington, D.C., this is Havana's El Capitolio. And just like the United States Capitol building that it closely resembles, their Capitolio is getting a facelift. Completed in 1929, a year after the only other U.S. president visit to Cuba, their capitolio is a symbol of the island's boom years when the price of sugar was sky high. No expense was spared. Long halls of marble, bronze elevators. A cupola even higher than Washington's. "They made a building," she says, "with all the resources they had in order to make an exceptional building." But that luxury and grandeur fell out of favor following the upheaval of the Cuban Revolution. After taking power in 1959, Fidel Castro wrote where His revolution intended to create a new society with new centers of power and buildings like the El Capitolio became synonymous with the waste and corruption of old Cuba, soon, it fell into disrepair. Cuba's national assembly relocated to this ground convention center. At the El Capitolio water leaks through the roof and bats took up residence inside the building. But five years ago, a team of Cuban government preservationist embarked on the painstaking effort to save El Capitolio. Slowly, decades of neglect were stripped away. When work began, they said, architects did not know that the Cuban President Raul Castro intended to move the national assembly back to the capitol.</s>ALLEN: A mathematical mystery 300 years in the making coming up. Meet the man who solved one of the most famous unsolved problems in the history of math.
Obama Starts Cuba Trip Tomorrow.