The Woolworth Mansion at 80th and Fifth Avenue. The fully renovated, over 18,000-square-foot neo-French Renaissance mansion was built in 1916 by famed architect C.P.H. Gilbert for Frank Woolworth, the founder of the F.W. Woolworth Company. The seven-level, 35-foot wide townhouse features a limestone façade, ceilings reaching over 14 feet, and elevator service to all levels. On the market currently, if you’re a Russian oligarch with $90 mil to burn.