from Julia Koch, widow of David Koch ... which The Post reported is the most expensive house in America valued at over $1 billion. The 740 Park sale was brokered by Corcoran’s Leighton Candler ...

Julia Koch, one of the world’s richest women with an estimated net worth of $74.2 billion, according to Forbes, has just sold ...

Julia Koch, the widow of billionaire industrialist David Koch, has sold her duplex at the exclusive Manhattan co-op 740 Park Avenue for $45 million, according to property records. The Kochs paid ...

Katherine Marks for The New York Times Julia Koch sold a duplex there that she ... once known as the “pink house” but now yellow, was purchased from the estate of Celeste Martin, a former ...