Paul has been treated so badly,” says a woman whose Manhattan apartment was designed by Paul Rudolph, the Kentucky-born architect. She is referring to the indifference, and worse, that has greeted much of Rudolph’s architecture in the last three decades. Even before he died, of mesothelioma, in 1997, Rudolph was forced to travel to Asia to find clients. Since his death, several of his works in the United States have been demolished, and others are being threatened with the same fate. But inside this apartment, Rudolph is receiving the kind of treatment most architects can only dream of. The owners have kept the main rooms — completed almost four decades ago — exactly as they have been.