Built in 1840, 44 King is one of the Charlton-King-Vandam Historic District's Greek Revival style brownstones. Located in lower Manhattan just one block south of Houston Street, it was registered in the New York City Landmarks Preservation Commission in 1966, and in the US National Register of Historic Places in 1973. https://en.wikipedia.org/wiki/Charlton–King–Vandam_Historic_District
This property is off market, which means it's not currently listed for sale or rent on Zillow. This may be different from what's available on other websites or public sources.