From the outside, 1212 Fifth Avenue looks every inch the classic Upper East Side luxury building. Behind that circa-1925 brick façade, though, are some very contemporary condominiums for sale. A comprehensive renovation that accompanied 1212 Fifth's conversion to condominiums left the classically pre-war design elements in each apartment intact, which means high ceilings, elegant moldings, hardwood floors and oversized windows are the rule; certain condos at 1212 Fifth also feature fireplaces. But that renovation also brought in a host of very contemporary comforts. In some cases, as with the new energy-efficient windows and heated floors, these are hard to spot. But it's impossible to miss the top-of-the-line fixtures from Miele and Bertazzoni in the new kitchens, and the custom Italian cabinetry and Caesarstone countertops stand out, as well. The same goes for the elegant baths, which feature imported marble, custom vanities and other upscale finishes. Like every other luxury condo on Fifth Avenue, 1212 Fifth offers some jaw-dropping views of Central Park and such familiar luxury condominium conveniences as a 24-hour concierge. Unlike its pre-war neighbors, though, 1212 Fifth Avenue also features a host of amenities to rival those of any new construction condominium on the Upper East Side. The new 2,600-square-foot fitness center is strictly state-of-the-art, from the new cardio equipment to the Yoga and Pilates studios. A well-appointed children's playroom offers copious diversions for the younger set, and the residents-only lounge is ideal for larger-scale entertaining. And, of course, there's Central Park and all its attractions as a front yard. Yes, Central Park is right across the street, and yes 1212 Fifth Avenue's address embodies old-school Manhattan luxury. But, in every way that matters, this classic pre-war condominium is also one of the most modern new condo listings on the Upper East Side -- and one of the most promising new condo listings in Manhattan.