Renowned Brazilian architect Oscar Niemeyer was hospitalized in Rio de Janeiro's Hospital Samaritano, but his doctor said Wednesday that he was "fine" and in stable condition.

Niemeyer, 104, entered Rio's Hospital Samaritano on Saturday, according to spokeswoman Bruna Tenorio.

The architect's doctor, Fernando Gjorup, said by telephone that Niemeyer "is fine."

"He's a bit dehydrated. He entered the hospital complaining of nausea, but little else. He's on a saline drip, that's all," Gjorup said.

The physician gave no forecast on when Niemeyer might leave the hospital, where he spent nearly two weeks in May being treated for pneumonia and dehydration. Last year, he was treated for a urinary infection there.

Niemeyer designed much of Brazil's futuristic capital, Brasilia, and Rio's Sambadrome, where the annual carnival parade is held. He also helped design the United Nations building in New York City.